The Money Problem
Why would Marvel give Sony one red cent for use of the Spidey universe? Sony is already paying THEM, so they would give Sony back money... for what? They don't need him. He doesn't help them. The only people it helps are fans, and if Marvel were in the habit of paying money
just to make some fans happier, then they'd just start mailing money to fans.
The Continuity Problem
If Spidey is in the MCU, why in the world doesn't he help against Thanos? Why is SHIELD not all over him like they were in the Ultimate Universe? Why is the only continuity between these people who would naturally come into contact an easter egg?
Fans don't care much about continuity. They're used to nonsensical stuff, and are quite satisfied with "he just couldn't answer the phone off screen." Movie audiences are used to a bit more solid continuity, as they well should for stories with only 10-20 episodes. There's no reason or need for shoddy continuity in the MCU. Bringing Spidey into the MCU does that, and that can work to the detriment of a movie universe that has actively thrown out comic book contrivances on a regular basis.
So while fans may be happy for a moment at Spidey being off screen in the MCU, it would quickly be replaced by anticipation of seeing him onscreen, and naturally so, because it only makes sense at that point. So they're going to be more and more disappointed. Not to mention fans, both comic and from the GA who actually like continuity, they're going to be disappointed. Then you have people who actually like the classic Avengers, and dislike the Bendis-era Avengers. Also disappointed.
Conclusion
So, even a cameo does NOTHING for Marvel Studios, it doesn't make them any more money and it doesn't make their fans any happier.
Aww, that's adorable. But I really think you know what I meant.
Or maybe I should have written AVENGERS in giant bold letters just in case someone came along with contrariness on their mind.
I understood what you meant, my point was that all those people who said that were out of touch with the reality of ten years ago.
Those other crossovers are not really the same situation at all. As to Spidey in the Avengers, you are assuming that it has to be a win/lose situation and that there is no way that it can be a win/win situation on some level. We don't know what is in the art of the possible. I for one would love to see it happen, if only to acknowledge that the events of TASM are happening within the MCU.
Not assuming. I've illustrated how they already have a win/win situation, and changing it would cause one company to lose something.
If Spidey is in Avengers 3, they have to answer questions like: How much of the profits from A3 should Marvel share with Sony for their character who doesn't bring any fans who don't watch Avengers already?