During the 700 space hops scene, where we see Rocket and crew passing over a number of planets, some of them struck me as possible Easter eggs or references to other known properties.
In this scene we see Stan Lee's cameo, for instance. But there were other planets, such as one with two blue-looking gladiator-like aliens who paused their fight to look up at the spaceship jumping through the area.
The Stan Lee scene is the only one I can personally identify, and it also had the longest screen time. Others happened so quickly that I don't recall the details.
Do we know, or can we make an educated guess based on commentary and/or comic books, what these other planets or who these other characters are?