Well in today's Nintendo Chat the IGN crew said something about some companies having "pre-E3" shows. NOA is one of them
-Activision and EA event this week. SEGA, Ubisoft stuff coming
-can't talk about the stuff they're seeing just yet. some may be let through, most probably not til E3.
-alot to come, they're busting ass.
-Multi-player Conduit coming in the next couple weeks. in depth stuff too. NOA showing something off Tuesday.
http://www.neogaf.com/forum/showthread.php?t=360640
So what could it be? the rest of the "spring" releases that Reggie said a month ago (wich is weird because those games would be released in summer months: June, July and August)