Okay, so anyone who was a fan of Ewing's Guardians and the massive roster...too bad, because we're going to just blow it all up, turn somebody into a traitor, and scale it back to a Space Western.
Was Groot the traitor? Is that what Grootfall refers to? Is that why Rocket isn't in there?
But it is basically the current movie roster + Gamora. Mantis has her human skin back which is either a plot point or just so she has skin that better matches her MCU counterpart. Also she's ditching pants and the skirt.
I like Kelley and Lanzing so I'll at least give it a shot.