In 2013, the fan-favorite comedian appeared on Parks and Recreation, playing, Garth Blundin. In the episode "Article Two", Garth attempts to filibuster a local piece of legislation by outlining his proposal for Star Wars: Episode VII, which was in production at the time. What followed was a nearly nine minute-long crossover pitch, entirely improvised by Oswalt, which imagines the Star Wars universe crossing over with the Avengers and the X-Men.
While Oswalt's pitch is admittedly still a little too fantastical (especially because a Star Wars/Marvel crossover is probably not in the cards), there is a bit of irony in what it sort of predicted. At the time, Marvel having both the Avengers and X-Men back under one roof seemed next to impossible, as Marvel Studios was trucking along in its second phase, while Fox's X-Men universe was gradually rebooting with the help of X-Men: Days of Future Past.
The fact that both the Avengers and X-Men are back together now - and are owned by the same company that owns Star Wars - is a pretty great coincidence. Even Parks and Recreation showrunner Mike Schur has since pointed that out, in an interview back in 2016.
"Not to get too theoretical about it, but part of what was so great is that he was tapping into this real trend in movies." Schur told Vulture. "Everyone is in everyone else’s movie. It’s Batman v Superman but also maybe Spider-Man is in it somehow? And in the Avengers universe, obviously, everybody shows up. The success of those movies will undoubtedly lead someone to say, “Hey, what if Han Solo meets up with the Guardians of the Galaxy?” Right? There’s almost no kind of crossover or universe-merging that seems impossible now."