Let me start by saying...
THERE IS NO PROOF THAT THIS IS OFFICIAL.
It could be made up for all we know.
But rumor has it that the picture on the front page of MMO-Champ is Blizzard's current schedule for the next few years.
Not much special there, except for two things: WoW expansions 4 and 5 (both inevitable), and something by the name of "Titan," Blizzard's very hush-hush new MMOFPS. Titan's only just a codename, even. Supposedly. Maybe.
Anywho, there's not really much of substance, but it's still worth a read.