Avengers: Infinity War - How ALL 18 MCU Movies So Far Tie In
4. Spider-Man: Homecoming
Mentions Of Infinity Stones?
None: the McGuffins in Homecoming were the Chitauri tech left over from the Avengers battle mostly. This being Spidey's first personal story, it made no sense to bring in the Infinity Stones and too many other Avengers.
Relevant Story Details
Peter Parker wanting to be a full-time Avenger is the big one, as that's precisely what he'll get to be (at least temporarily) when he ends up surfing one of Thanos' ships out Earth's atmosphere and is pledged into the gang by Tony Stark.
But, that doesn't mean it's a good idea and Tony's reluctance to allow him to make the step up - based on his naivety - should come back to haunt him after he allows Peter to join in. There's certainly a hint in the trailers that something grave happens to Spidey, who will definitely be out of his depth against Thanos.