I received the Avengers and X-Force team sets in the mail today from BBTS.
Received those as well, really looking forward to the Fantastic Four set (hopefully coming this month). I know our daughter is really looking forward to being able to have a Sue Storm/Richards figure.
I noticed that BBTS also put up some new preorders including Wave 4 (which we know about - Darkhawk, Steve Rogers, etc.), and also Wave 5, which I didn't know about. Here's what they list as the contents of Wave 5:
Tony Stark Iron Man
Astonishing X-Men Wolverine
They also list a Guardians of the Galaxy "Team Pack" coming in that same line that released the Original Avengers and X-Force sets.