GameStop has a listing up for a Marvel vs. Capcom 2 Retail Pack. It's going to go for $19.99, $5 more than what the downloadable title will sell for. It looks like it's only going to be available for the PlayStation 3 and the Retail Pack is set to include:
The GameStop listing has the game dated for August 13, which may or may not be correct. Last we heard, the game was supposed to be coming out on June 29, which still may be the case. The Retail Pack may just be coming out at a later time.
We've gotten in touch with Capcom to see what they have to say and to see how curleh their mustaches are.