Derock

Sonic and the Flash tried to get the Chaos Emerald from Darkseid but failed and he escaped. Flash let the others in the League that they failed to get the emerald while the others couldn't find the other 6. Meanwhile, Darkseid returned to Ragna Rock demanding a report on the remaining six, and then sending in his warriors to find them. Tails and Cyborg managed to create coordinates for the others to locate the emeralds. While the JL trying to formulate a plan to stop Darkseid from taking over Sonic's Earth (and no, it isn't Mobius anymore for the US fans), Darkseid's warriors appeared to stop them, with Steppenwolf battling Batman and Shadow while holding the red emerald, until Shadow used Chaos Control. However, Darkseid is one step ahead as sparks and earthquakes began to shake all over the planet, disrupting time and space.

 

While this is happending, Eggman appeared on the Egg Carrier, forcing to team up with Sonic and the JL to stop Darkseid. The group launched an attack on the Ragna Rock (although Diana commented that she will deal with Eggman after Darkseid defeated, which excites Amy... Eggman is going to run to the hills if that's ever happening!) Team Sonic and the Justice League tried to stop Darksied and neutralizing his device with a face, with Shadow using Chaos Control on him, unfortunately, that didn't work. Flash tried to stop the device with Cyborg noticed that the dimensional energies are out of sync because of Darkseid's mess. Because of the Chaos Emerald energy, reality was collapsing. John hold Sonic and his friends in a green sphere in which Cyborg send them to a different dimension via Boom Tube as they and the rest of the League stayed behind to stop Darkseid, resulting Sonic's world to disappear. Team Sonic arrived at the Watchtower as Mr. Terrific stated that everyone in that world has vanished...

The turtles gave Team 7 a tour of "NYC", with Mikey trying to rap, of course.   After getting the pizza, the group noticed that the lair had been ramsacked by the Foot and April and Splinter are kidnapped.

 

Meanwhile, at the Foot Clan Castle, Shredder is using the two as bait but then revealed that the last ooze was hidden in a scroll April was carrying. Upon the reveal, April was shocked that bringing back the ooze will doomed "NYC", but Shredder stated he is not using it to destroy the city but using it to test its full potential on a worthy foe. He then used the ooze on four of his Foot ninjas. Alopex was surprised that the ninjas are mutanting into monsters and felt betrayed as Shredder commanded the mutated soldiers to get rid of her. 

 

Then the TMNT and Team 7 arrived to save the day and the typical battle commenced. First pages are Sakura and Raph against the Foot Ninja in with Red claws. Ended with the "Cherry Blossom Shell Smash". Next is Kakashi and Leo against a Yellow Foot Ninja that use rapid attacks, they both combined Raikiri with Leo's Katana: "Lightning Katana" to finish him off. Then, its Sasuke and Donnie fighting a Blue Foot ninja with Wolverine-type claws, that defeated the foe with a combo divekick called, "Sharingan Staff". Finally, Naruto and Mikey, whom struggling to fight a Purple Foot Ninja with wings but concluded that they were fighting pizza dough. Finished with an "Uzu-Mikey-Angelo Barrage". But then, Shredder used the last of the ooze to transform himself... the final battle commence in the fourth and final issue.

Superman/the Justice League's nemesis, Darkseid, began attacking Sonic's world and is after the Chaos Emeralds. The Ragna Rock appeared while interrupting Sonic, Tails and Amy's picnic. While this was happening, Knuckles was defending Angel Island and the Master Emerald when suddenly Darkseid sent a huge beam, destroying the Master Emerald AND Angel Island! Superman appeared in time to save Knuckles. The swarm was attacking Sunset City where Sonic and the others were heading. Silver, who was in the city, gain assistance from Green Lantern (John Stewart), Sonic met with the Flash, Amy and Tails teamed up with Wonder Woman and Cyborg, Superman and Knuckles appeared and Shadow and Batman saved a female posseum. After the introductions, along with Batman and Shadow had a heart to heart conversation as they are so similar, the 2 teams paired up to locate the Chaos Emeralds. Sonic and the Flash reached Green Hill Zone to discover that Darkseid just found the blue emerald.

There is an awesome cover artwork of Batman fighting Metal Sonic.