At least the first round. I don't see a bracket anywhere to figure out the semis, but ChessVibes has plenty of info. They begin on May 3 in Kazan, Russia.
Topalov (BUL) - Kamsky (USA)
Kramnik (RUS) - Radjabov (AZE)
Aronian (ARM) - Grischuk (RUS)
Gelfand (ISR) - Mamedyarov (AZE)
The matches, with the above pairings, will be played over four games. Two days after these matches end, the second round starts, with the winner of Topalov-Kamsky against the winner of Gelfand-Mamedyarov and the winner of Kramnik-Radjabov against the winner of Aronian-Grischuk. These matches will also consist of four games. The final match will consist of six games.
Not a slouch among them, naturally. Feel free to pick your winners and also to rant about the injustice of your choice. I'm the Carlsen discussion can be kicked around the block a few more times, too. I do wish he'd followed up with more of an agenda. I am glad that when they replaced Carlsen, a rating qualifier, they went to the Grand Prix. World championship cycles should be based on playing in them and rating qualification should be as far removed as possible. (That is, most of the Grand Prix players were there by rating, and the World Cup players, etc.) Sadly, that only raises the number of players who directly qualified for this cycle to four.
It's very hard to pick against Kramnik in match play, but these are so short, four games, that a single loss is likely fatal and rapid tiebreaks loom. So it's a crapshoot, but one with very high stakes.