>Seems like theyre focusing their attention on
>Avengers-related titles, which, especially now, makes senses,
>given its their biggest hit.

I mean, it's not exactly hard to make him part of the team. He was once offered a spot on the team in the comics and he turned it down, they could do the exact same thing with him helping out the team for a film, even crossing over into a couple of characters solo films, but making things clear that he's got his own priorities.

He's a much stronger character with better recognition to build around.