Wrote this in the news thread:
Originally Posted by Shikamaru
I don't think anyone wants Spider-Man as an Avengers member. I always preferred him by himself as well. I think most people are just asking him to be there, not necessarily join the team. The universe feels really empty and awkward without a Spider-Man being there swinging through it. A small easter egg or something establishing his presence would be enough.
But if it never happens, I'm not losing sleep over it.
I don't see why everyone is so black-and-white on this issue. The MCU isn't as simple as "either you're an Avenger or not". Not every superhero we've seen was an Avenger.