Im in the vein of the manga ending thusly.
Naruto and Sasuke stand up and thank respectively Sakura and Karin for everything before leaping to the fight with madara. Naruto as he leaves makes a somewhat offhanded comment about Sakuras forehead and how its something hed love to kiss before smiling and leaving. Sakura is stunned and a replay of the bench scene plays through her mind.
Sasuke apologizes to Karin more sincerely then the earlier apology. Thanks her for everything and gives a rough if sincere confession of mutual feelings for her.
the two work together just like old times and seal Madara ending the 4th great ninja war.
Sasuke isn't done yet though he still believes that his way is right, Naruto and Sakura argue with him about family and friendship and how they can change the world together.
Sasuke isn't convinced though and in spite of karins own attempt to convince him challenges Naruto one last time. A final fight to prove whose philosophy is right. Naruto reluctantly agrees to Sakuras horror.
She tries to intervene But Sasuke puts her under a genjutsu and out of the way. Naruto is pissed and berates him for this only to have sasuke mock his feelings for Sakura something which causes even Karin to lay into Sasuke for.
the two leave fast meeting at the vote for the final confrontation where the emotion and power are palpable like some oncoming storm.
the battle is fearsome and reshapes the landscape in its raw power. with the two starting out at full power and as they fight more and more the battle goes in reverse of their earlier encounters. down to sage mode and snakes to kyubi cloak and cursed seal down to two kids fighting with their fists.
Finally after a final fateful clash of rasengan and chidori leaves both badly wounded they throw a final punch which collides with Narutos forehead and Sasukes jaw.
Sasuke is laid out and Naruto remains standing only to collapse a few moments later.
Before he hits the ground though Sakura catches him having hauled her booty there faster then ever before. Naruto smiles at her and she bursts into tears and collapses on him in a replay of the OVA. with him conforting her as Karin and kakashi arrive some what slower unable to keep up with Sakuras new found speed.
Sasuke lays on the ground eyes open unable to move watching Naruto and Sakura tease and rib and care for each other thinking something along the lines of about damn time.
he then looks at Karin and gives a last and truly sincere apology including a joke that it seems to be all hes able to do for her lately. She tells him to shut up calls him an idiot in the way only she can and lets him bite her to start healing again while sakura heals Naruto and aids Karin in healing Sasuke.
this establishes a new dynamic between team 7 with Karin as part of the family circle.
the manga ends with kakashi taking over as Interim Hokage he flat out refuses the seat itself saying hes a terrible choice and will merely keep it warm for the true hokage when hes ready.
Sasuke is pardoned due to his actions stopping madara and the IT but told flat out not to step out of line or else no mercy. Kakashi also mentions he should be wary of leaving konohas borders for a time as some sore feelings might still linger for a while.
Sasuke is confronted by Sakura who again asks him why hes leaving. but he says he has to that he needs to see the world through fresh eyes, and rebuild bonds hes broken in the process.
Sakura ever caring asks about him being alone but he looks over his shoulder to where Karin is hiding and smirks saying nah hes got family this time and friends to watch his back. He compliments Sakura on her growth and says hes proud of her thus closing a part of her own circle regarding him as she gets his acknowledgement as a shinobi.
He then turns to leave and asks her to take care of Naruto for him, and that the dunce needs her. She says she will with a slight blush as his meaning sinks in. Sasuke joins taka and the group leaves together with Karin and Sasuke almost about to hold hands.
Naruto meets them and hands Sasuke his head band as a reminder and tells Karin that as family shes always welcome she thanks him and agrees. Sasuke thanks him as well and tells him to make sure to tell Sakura how Naruto feels about her.
Naruto at first tries to deny things but a look from Karin silences him and he gets a determined look that says yeah I will as they part ways.
Sakura and Naruto meet later and on the very bench where it all began he again compliments her forehead and she let shim know shes figured out it was him all along. he kisses her forehead and the two confess mutually that they love each other.
the prologue ends with Naruto becoming Hokage as Sakura and friends look on including baby hanami and toddler Shina.
the Shinachiku movie to me would be the what the last should have been.
Sasuke uncovers a plot in his wondering to bring back Kaguya otosuki by Black zetsu who survived the war, and the discovery that black zetsu had manipulated events for centuries for that purpose.
Shinachiku now a ninja and his teammates including Sarada Sauske and karins daughter and Shinas unwitting crush. work together to save the leaf village and the alliance from the world spanning plot which takes them all over the elemental nations to destroy various mini trees of life that are trying to bring the moon crashing down to earth so kaguya will be freed.
the kids are forced to grow up fast and mature as they do in order to save the world.
Shina seems destined to follow in his fathers footsteps but is reluctant because its almost expected of him not because he thinks hell do a bad job.
Sarada has to live up to the legacy of her family and think she has much to prove while in reality she is fully capable.S he wants to be Hokage to right the wrongs of the past and make things better.
the initial conflict between the pair is based on this combination of rivalry and mutual respect and is the catalyst for the growth of the pairs relationship. which is filled with the usual comedic pratfalls and roadblocks as Sarada is jealous of the numerous fangirls while trying to keep an aloof façade around Shina.
Shina of course likes Sarada and could easily have feelings for her but is put off by her standoffishness and rivalry over the hokgaes seat and the pair bicker as often as they work together well.
its only after a particularly grueling battle that shina heals Sarada and the pair bond over some childhood memories that they start to understand each other and the relationship takes a next step forward with a gentle touch and near kiss.
the movies climatic battle scene features black zetu succeeding in reviving a weakened kaguya and the moon being stopped. Naruto and sasuke and Sakura together defeat kaguya in an epic battle across dimensions where the three combine as the new sannin to defeat her. Karin catches black zetsu and destroys him with her chakra chains ending his threat.
the kids and families are reunited and life goes on with the next generation poised to take over for the older one as they move forward.
Sarada narrates the epilogue where she mentions that life happens mistakes are made but we can move forward, we learn and correct those mistakes and then pass on what we learn to the next generation.
Movie ends with Shina Sarada and teammate leaping through the trees into the sunset and the future.