If the Fantastic Four or the X-Men, or heck Deadpool, were brought into major storylines down in the future it could be a bit of a nightmare to explain where they’ve been during the events of Infinity War, but it could also open up a whole new world of storytelling for the brand, including potential crossovers.
Sounds like Kevin Feige has about as much knowledge as the rest of us, thanks to his comments at Produced By (via FandomWire).
Regardless, you have to think he and the other key players at Marvel have at least looked at what pieces they could potentially have down the line in a year or two and how that could play out in the MCU (or not) as a whole.