I expect it to be CM Punk vs. The Rock for the WWE Championship which would mark the first time since 2006 that a match other than the 30-Man Royal Rumble match closed out the Royal Rumble PPV. The other instances were 1988, 1996, 1997, and 1998.
The Rumble match was the fourth of the six places to take place in 2006 and this year, I expect the Rumble match to be the next-to-last match on the card.

Ambrose "NOPE."

Miz v Cesaro,US title,obviously. That or Del Rio-Big show.

Punk vs. Rock is definitely closing the show out