It seems Activision is trying to get a head of everyone at E3 this year. They pushed out a late press release stating they werre going to webcast E3 remarks on Sunday, May 31st. That is a couple of days ahead of the Expo.

The presentation will happen around 5:00 pm PT / 8:00 pm ET on the and the whole presentation will happen live over the internet. The link for the broadcast is  http://investor.activision.com/eventdetail.cfm?eventid=69233.