I'm expecting this match to happen this year at WM. Either that or it'll be Ryback vs. the Shield.
Watching Raw this week, I was struck by the fact that it could be the last time we'll see Punk with the belt. With so much other talent (Bryan, Ziggler, Sandow) waiting in the wings, and with Cena out to claim the belt again, I can't see them giving Punk another run with the title any time soon.