After Fantastic Four, Marvel fans all have the same question: what's going on in the Thunderbolts post-credits?

The Fantastic Four's ship the Excelsior in the trailer for The Fantastic Four: First Steps.

Warning! This article contains spoilers for both Thunderbolts* and The Fantastic Four: First Steps.

Thanks to the Thunderbolts* post-credits scene, we'd all assumed we knew how The Fantastic Four: First Steps was going to end; with Marvel's First Family having hopped on a ship and travelling, somehow, to Earth-616 on the Sacred Timeline. You know, the universe in which the Avengers exist...