I hope a developer can comment on this. Would be really nice to know if they're really analog. If it's true Nintendo has been listening to some third party developers, then they probably requested analog triggers if they weren't already there.I really hope it comes to fruition. It initially sounds like my kind of game.
Also a poster by the name of Dark_Link92 pointed this out. Nintendo Gamer is claiming the triggers are analog.
http://www.nintendo-gamer.net/2012/06/12/wii-u-your-questions-answered/2/