Originally Posted by
Hybrid
Main issue is that the MCU is seen as the be-all-end-all portrayal of the Marvel Universe, more legit than other sources including the comics themselves, and being in the MCU some kind of rite of passage to being recognized as a "real" character. In any other adaptation, such as animation and video games, if you make a wishlist that includes lesser-known heroes (relatively speaking) that weren't featured in the movies, you'll be called "unrealistic" for wanting a "fringe character". A prominent example of this being Marvel vs. Capcom Infinite. Unfortunately, Marvel has done nothing to combat this perception and indeed has even added to it themselves, what with the animated series just being MCU ads, and the aforementioned MvCI being horrible because it's just an MCU plug.
Now, if we're being perfectly fair, this problem exists in other spaces. The FoX-Men for example focused so much on Wolverine, then Magneto and Xavier, that the numerous other characters in the X-Men lore got shafted. As a result, when making a wishlist for a hypothetical Marvel vs. Capcom 4, I included both Kitty Pryde and Magik on my wishlist, and got crap for choosing "random and obscure X-Men" characters over others, primarily MCU ones even if they would've added little to the game itself. That's also why many are excited for MCU X-Men, mainly that we'll actually see other parts of the mythos and get focus on other characters. Hopefully.
Likewise, the horrible Fox FF movies are the reason why people have this idea that the FF are as lame as you can get, because that's all they've been exposed to. The concept can not only work, but work very, very well. I mean, The Incredibles was basically FF in spirit, and everyone loves that movie.
It shouldn't be that way, and it is. As a result, for something that is the be-all-end-all, I feel the characters' portrayal in that universe matters. Spider-Man's portrayal in the MCU is going to take precedence, and that sends a bad message. Spider-Man in the MCU should be perfect opportunity to promote his own lore, not someone else's.