Some of the WDI left for a trip to Tokyo recently and to do some final work on the project including test and adjust and preparation for opening. I don't believe the attraction is schedule to open for a few months.
Considering the slew of stuff that came out for the Tower of Terror when it opened at DisneySea (and even quite a bit for a lousy ride like Raging Spirit), I'm sure there's going to be a ton of great items for the opening of Monster's Inc.!
There will be a Monsters Inc style TDL annual passport (TDS will be tinkerbell and 2 park will be sorcerer mickey) and there is a present campaign when you purchase it, the hotel promotion with special amenities, vacation package preview, Disney cruisers will be decorated to Monsters Inc (and will tour Japan?), the movie will be showing at Ikspiari Cinema (4/1-4/30)and will be released on DVD and Bluray (5/20).