Will Marissa's confession stop Scott's and Annie's wedding?

Well, it looks like you predicted right. JRs heart is with Annie and that is obvious. They are both liars and out for whatever benefits them regardless of who they hurt along the way. They have a lot in common. Both are very self destructive so I don't see them being happy together in the long run. Still, neither of them deserve good, loyal and basically honest people.

I think Annie and JR, and Marissa and Scott, are better together anyway.