Sorry, I know the topic's kind of changed but I had a bunch of thoughts on the Tsunade/Dan/Jiraiya thing and the NaruSaku parallels that I wanted to share with you guys.
I'd like to see what you think of it.
So NaruSaku has three parallels known so far in the manga. JiraTsu, MinaKushi, and ObiRin. Anyway, I started to notice a theme in these couples that not only reinforce the parallel argument, but they also fit extremely well with the surpassing the previous and NaruSaku's future. We already know this of course, but I feel like Kishi was trying to make a pattern somewhere in here other than similarities. It might be I'm just reading too much into it, but it seems to me that Kishimoto's level of obstacles for the NaruSaku parallels had varying degrees of severity and difficulty to it that intensely foreshadow Naruto and Sakura's eventual success.
I get the sense that Kishimoto's purpose of these parallels was always meant to blatantly explain that the newest generation will surpass the previous ones and that it was literally always meant to foreshadow NaruSaku was going to be endgame. That was why he had JiraTsu, MinaKushi, and ObiRin have similar backgrounds (more so OR & JT). I don't think he's just trying to show this in similarities, I think he was going in further by gradually lessening the amount of obstacles in each other parallel's relationship. Starting from JiraTsu to MinaKushi.
IMO, JiraTsu was by far one with the most difficulty. It had so many issues in Tsunade's core character that was not nearly as simple as loving another man and she also obviously regarded Jiraiya in distain for much longer out of the parallels. It took many, many years for Tsunade to IMO fully understand Jiraiya enough to love him. It was no question she did or at the very least had feelings for him, but I don't believe her feelings for him surpassed whatever she felt for Dan. In my honest opinion, that was the actually the point. It was supposed to be so damaged and impossible to happen to that extent. The first NaruSaku parallel was something in my opinion was one Kishi consciously chose to make that ridiculously hard to overcome to connect itself to Naruto's journey and his relationship with Sakura.
ObiRin was different and had much more simplified aspects to it likened to that of Early Part I T7: Boy with love for the female teammate that loved the cool one. It was less challenging than JiraTsu since Rin had always been kind to him from the start and had no trouble understanding him. Though, of course, we can never say for certain if she would've returned Obito's feelings if she hadn't died but the point of this is it was still portrayed as less complicated than the first NS parallel. It still didn't happen and again it wasn't supposed to, but the lack of problems on this in comparison to JT is definitely foreshadowing something for NS.
Lastly, we have the newest-introduced parallel MinaKushi. It turned out much, much differently than the other ones. And, looking at it from a simplified stance, it had an even more obvious lack of complications to it's way to canon than both of the other two for sure. All it had was that Kushina disliked Minato at first while Minato always had feelings for her, then led her to fall in love with him when he saved her, getting married, and having a child. Though the one thing they didn't surpass in ... was that had both died before they could truly live a life together as parents and family. Hint, hint. 
I might be entirely wrong and feel free to disagree, but the pattern seems to indicate that Kishi might've broke down the NaruSaku parallels from being as hard as possible to not even hard, though still lacking the final touch. It was meant to foreshadow that NS was given a mixture of almost all of these challenging obstacles deflecting their road to canon, but in the end it would be worth it because they'd surpass the previously failed relationship parallels. We know that part, but I'd like to think that my theory that Kishimoto simplifying the parallels was another means to imply NaruSaku, it was just a lot more subtle. 
I'd appreciate feedback on this, I very much want to know if any of you think my argument has validation. I'd be glad to hear your agreements or disagreements. 