I don't know bro... maybe Cena will win for that 16th title victory then Ruzev comes out to hurt him, Rollins then cashes in and that's how it goes down.
There's that maybe factor again.
Damn, I'd like to keep being optimistic and think Lesnar is gonna retain. Rollins will try to cash in his 'Plan B' afterwards, but he's gonna be stopped by either Cena/Sting, but will never officially lose the briefcase (just like we saw it at NOC), 'cause technically, the match wouldn't really start. Still pulling for him to cash in at Mania, though.
It's one of those times WWE isn't so predictable, so I'm looking forward to the Rumble.