Doubt Orochimaru and crew got pardons. Sasuke had the benefit of being connected to Naruto and necessary for the final victory, Orochimaru had none of that. More then likely, Orochimaru just got out of there while everyone was confused. As for falling Sasuke, that doesn't seem like his goal anymore after his revival. He knows he was right about combining Senju and Uciha Dna to gain the Rinnegan, meaning he doesn't need Sasuke anymore for that.
I think it's implied that Lee married Tenten.
You mean Kabuto gave him Senju Dna, Hashirama gave him some kind of technique that he never used. As for Sarada having it, probably, it's part of Sasuke's Dna now.
Orochimaru Edo Tensei'd the sealed Hokages, which helped save a lot of lives after they finally got to the battlefield. Suigetsu helped reattach Tsunade's split body back together, and Karin let herself be bitten to help Tsunade get back a lot of her chakra. I don't remember what Jūgo did. Even Kabuto, despite being the one to perform the Edo Tensei, helped by reviving Sasuke. Would be nice for Oro to be back in the Leaf and become the lead of their genetics research without all the evil intentions this time around. Most likely pardoned, but kicked out, and is now living in the Sound.
I've always thought it would Neji and Tenten would get together ever since Part 1, but then he died. I don't see the implications though, or even any hints. Sure, Tenten shows up the very next panel after Lee and his song/lookalike student, but that doesn't mean they got together. If only the kid was also carrying ninja scrolls on his back, then we would have gotten the hint.
Hopefully he uses whatever Hashirama gave him in the movie. I don't see a huge baddie being able to go up against Naruto or Sasuke if the special mangas lead to Part 3, unless another Ōtsuki comes down from the moon. If Bolt and Sarada get married, that child will be so OP. Even if the Haruno and Namikaze DNA are there to spoil everything, having Uchiha/Senju/Uzumaki/Hyūga DNA is something that's never happened before.
New Kishimoto interview
Seems like the special stories will only last for a short while. Says he's going to announce his new manga after next summer. Oh yeah! Here comes Masashi Kishimoto's next big hit, Boruto! (It's most likely not)