I mean, they've done this multiple times before (re: debuting Marvel trailers during Good Morning America). The only other ABC shows during which they've debuted Marvel trailers are Jimmy Kimmel Live! and Monday Night Football, neither of which are airing next week. Otherwise, it makes zero sense to debut a trailer during, say, Grey's Anatomy, considering, like you implied, the stars can't appear during those types of shows to promote the projects, it would make way less sense logistically, would be super random, etc.
Regardless, why are you so hung up on this? Because, again, THE SUPER BOWL IS FIVE DAYS LATER, which is all that matters eyeball-wise. It's utterly irrelevant in terms of Fantastic Four's success/awareness as to which show it debuts during prior to then. The GMA debut is strictly to get more eyeballs on GMA, not the other way around.