Rock can't feud with Brock, he's gotta feud with Austin in my fantasy booking head...
Rock beat Cena...and while The Rock beating CM Punk and winning the title and all that would be nice...he's gonna put Punk crazy over by losing.
Of course, he wouldn't lose clean to Phil...it would be interference by none other than
*imagine in Good Ol' JR's voice*
STONE COLD!
STONE COLD!
STONE COLD!
Rock realizes that legacy is more important than the title. Challenges Austin for Austin/Rock IV at Wrestlemania 29, which he will win.
John Cena gets arrested for pedophilia, Sheamus gets mobbed to death after cutting his 1000th unnecessarily racist and childish promo, and Rock wins the title, eventually. Austin vanishes for a while, gets a late number as a surprise entrant to the Royal Rumble, and wins the Wrestlemania shot.
Series tied 2-2, we get
Austin/Rock V for the WWE Championship at Wrestlemania XXX
As for Taker, I think Brock would be too serious a program for him, and don't remind me of the golgoplata.