Thunderbolts* Trailer Includes a Sneaky Callback to Captain America: The Winter Soldier
The characters' competing interests and loyalties repeatedly boil over in the teaser trailer, but it does seem like Val (Julia Louis-Dreyfus) is both the person who currently owns (or at least operates) Avengers Tower, and that she is putting together her own, darker version of The Avengers. Could that be what the Thunderbolts asterisk is about?