Originally Posted by Spider-Vader
If the cosmic heroes come into play, it'd most likely be during the third act of the movie & they'll just show up to fight. The Avengers would still be the focus of the movie.
I agree with this. Having the GOTG in there as well would take too much focus off the Avengers, IMO.
Plus, I don't really like the fact that them being there would probably limit expanding the Avengers roster.