The full line-up of minifigures in 71031 Marvel Studios includes:
The Scarlet Witch
Zombie Captain America
Zombie Hunter Spidey
Gamora with the Blade of Thanos
The last five of those are all characters we can expect to get to know better in What If…? Three of the rest of the minifigures are from WandaVision, with two each from Loki and The Falcon and the Winter Soldier.
That’s a fairly even split from the other three TV shows. Of course, by the time 71031 Marvel Studios launches on September 1 almost worldwide, with later releases in some locations, most Marvel fans will be at least somewhat acquainted with the animated characters.
Perhaps the LEGO Group are simply catering to what will be the most current Marvel TV show at the time of release, or perhaps they’re hinting at a future lean towards more What If…? content for incoming sets.