While speculation might suggest Eli Manning or Adrian Peterson, EA has gone with longtime Packers star Brett Favre. The announcement is expected tonight on Letterman.
According to the Facebook site for Madden NFL 09, the cover athlete is expected to be announced on April 25. Moreover, a quick check of the CBS schedule for Late Show with David Letterman shows that Favre is going to appear as one of Dave's guests tonight (April 24). For the past few years, EA has used late-night shows to announce the Madden cover. Last year Jimmy Kimmel's show was used to announce Tennessee Titans quarterback Vince Young for Madden 08.