Just saw it for the second time.
Couldn't get the idea out of my head that this COULD have been Episode 7. Just with a quick reskinning.
Clean up the language, and a change to some of the violence, and the intensity of it, could probably get a PG rating.
A hundred years after ROTJ. Ronan the Accuser is the last of a resistance movement of Palpatine fanatics.
Thanos is a mysterious figure known only at "The Sith Lord." Nebula and Gamora are the same as in the movie. Maybe they have lightsabers.
Cut the "Star-Lord is from Earth" plot point. Cut the Earth-based humor. Otherwise he's the same. Rocket is not QUITE a raccoon, but still the same.
Nova-Prime is now the head of the Republiuc. John C. Reily and Peter Sefernowitzcz are Jedi. The various people running around Nova-town can include some Star Wars aliens we reocgnize.
The Infinity Gem is now called "The Kiber Crystal" but is basically the same. Maybe Del Toro's monologue could change the background so it's "something, something, the Force"
BTW, I'm not suggesting this is an improvement.