It seems to be just MCU What if? with only characters and storylines from the movies and shows. I don't think we'll even see Spider-man.
The zombie one seems to be the only really "out there" concept.
Some of the best What if? comics included the X-Men, Fantastic Four, Dr. Doom and Punisher. Hopefully we'll get some of those when those characters are moved into the MCU.
It'll be a while before we see what would happen if Dazzler had become the herald of Galactus.
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