Spider-Man in the MCU? What a thought. It’s a happy thought for all fans. Andrew Garfield as Spider-Man in the MCU? Still a happy thought, but not for all fans. Most people who want to see Spider-Man alongside the Avengers want a brand new Spider-man that has no ties to Sony, and isn’t played by Andrew Garfield. I wouldn’t mind this, as it would give Marvel a chance to do the PERFECT Spidey film that we’ve been waiting for ever since Spider-Man 2, I would personally love if Andrew Garfield's Spidey was in the MCU, because I think Andrew is a brilliant Peter Parker/Spidey. But, i don’t think we will see Spidey in the Avengers until Sony lose the rights. But i do think it’s possible to see/hear of Spider-Man before that, before Sony lose the rights. I think that if Marvel/Sony made out a deal that somebody in one of their films can mention the name Spiderman; if someone in one of the Spider-Man films can use the word Avengers, Win/Win right? All it would take to do that would be a handshake and 2 script changes. More people would go see Sony's SM films after that, in the hope that the Avengers would actually appear, and more people would see the Avengers in the hope that Spidey would show up. That is Scenario One.
Scenario 2 would be if Sony and Disney decided to put Spidey in the Avengers, this would be harder to do, as there would have to be boundaries and guidelines laid down. I would imagine Sony would only ever do this if they were given a big sum of money, Unfortunately Disney would never do this, why would they give more money to a rival company, to fund future Spiderman films, pushing back the date they get the full rights back? Scenario 2 is out of the question.
I think Scenario One is the only way Spidey will ever be mentioned in the MCU. They could have someone mention the name Spiderman, and then never address it again, until the rights come back a couple of years (or decades) later. Then they could have the simplest of post credits scenes, Show a young boy on a school tour being bitten by a radioactive spider, while someone shouts "PETER, get away from that" , it would only take a couple of seconds to film, and they could hire the actor THEY want to play Spidey, they could actually film it in such a way that the boys face is never shown, and the best part is? They could do it legally, this way they can push back the casting until they get the full rights, while already having him established. Nobody wants to have another Spiderman film that shows his origins, we already know what happens, everyone does. Having his origin set up in less than a minute would be ideal. They could have a one-shot after that that shows the same scene, but adds on another 14 minutes, with the end on the One-shot saying "Peter Parker will return." Boom. Origin could be done in 15 minutes. They could havea solo Spiderman film without having his origin taking up half of it. All they would have to do is ask Sony can the mention his name once. Perfect and Sony could do nothing.
So everyone who wants Spidey in the MCU, don’t lose hope, it could happen sooner than we think. (Kinda)