I’ve played Marvel Champions maybe a half-dozen times, mostly with Spider-Man and Captain America.
I’ve played solo, and I have yet to play this with my gaming group.
I bought too many expansions which have yet to be played, so I stopped buying every expansion as it came out. That was the completionist in me.
When this game came out, another Marvel game came out as well, one that I was interested in but didn’t want to get into, because miniatures were involved, which is bad for my completionist tendencies.