Spider-Man Web-Slinging In To "The Avengers" Film?

Way last week, British actress Jenny Argutter let slip in an interview that Andrew Garfield could be web-slinging into this years "Avengers" film before seeing him in full form in the upcoming "Spider-Man" reboot afterwards. 
Now a "trusted source" has mentioned that Garfield's Spider-Man could be indeed cameoing in "The Avengers" film. He'll probably just be appearing for like a few seconds, like Hugh Jackman in "X-Men: First Class" last year. This cameo could be a way of promoting the new reboot with the small time actor.