At its heart, the FF concept is about exploration. I really liked the term Imaginauts to describe them. Sure they are a family, but that's incidental.
Would an ongoing TV show be a better fit for them? They go on a trip to explore the mysteries of the galaxy, or the microverse, or the Negative Zone, or wherever?
Think Star Trek or Lost in Space, but with the core four. Would that be better and/or get around this Fox thing?
We don't know much about it yet but I wonder if Noah Hawley is looking at making the Victor von Doom project a Netflix movie. I don't know if he can get a theatrical release movie budget out of Fox, esp when Rupert Murdoch called out the Fantastic Four movie as the reason for Fox studies losses that year. Probably his sons have taken over more of the business at the point but we don't know what they would decide.