[Confirmed]: There were no death scenes shown in the preview event.
[Confirmed]: Wedding was shown in the ending. Naruto did mention essentially, "to death 'til we part".
[Confirmed] Little to no Sasuke in the previews. Sorry, fangirls. This is the fifth blog that mentions this and they have photos to prove that they were there.
[Confirmed] Sakura was pleasantly cheering on Hinata to send her thoughts to Naruto.
Sai and Shikamaru are a 2-man unit doing a portion of the rescue mission. (Trying to find another blog that will corroborate it)
[Confirmed] Sakura tells Naruto directly along the lines of: (my translation) "Once you like/love (someone) as a young girl, you really cannot simply abandon/give up (that thought)" This is why she never wavered about Sasuke, apparently.
[Confirmed] Last scene that they saw was the marriage one.
[Confirmed] Iruka spoke with Naruto regarding the end of the world/humanity. It doesn't say if this is the scene where he cried though.