We know that Smash Bros. Brawl news is coming via the official website revamp, we’ve heard that Metroid Prime 3: Corruption news may be on the way as well. Now we have a few more details on the actual event (via a NeoGAF thread)
The Media Summit will take place May 22 (all invitees) and May 23 (pre-approved long-lead only invitees on embargo).
It looks like a bunch of news on the 22nd, and then print magazines will get an early peak at E3 stuff so they can get their upcoming issues ready. Thanks to Sobe for the heads up!