This is how I fixed the LEGO Guardians of the Galaxy Vol. 3 sets, and you can too!
I made an entire MOC of Knowhere and fixed several of the figures included in these sets, as well as making my own custom figures!

I added and fixed LEGO minifigures such as The High Evolutionary, Star Lord, Rocket Raccoon, Nebula, Gamora, Mantis, Drax the Destroyer, Groot, Kraglin, and Cosmo the Space Dog.
This is sure to satisfy fans of LEGO Marvel and Guardians of the Galaxy alike!

Credit for clips in this video-
Marvel Entertainment
Jekester
Ashnflash
Krutikov Music