As James Gunn announces Guardians Of The Galaxy Vol. 3 before 2 has even come out, I remain amazed that the holders of the X-Men movie licence haven’t tried to make Starjammers yet.
And that nobody’s tried to make Star Slammers either, which is not the same thing. Or Six From Sirius.
Alien Legion, Dreadstar and Strikeforce: Morituri have all been optioned at various times.
And that’s just Marvel.
DC integrated space opera a bit deeper with Krypton and Green Lantern, but still has non-super-universe outliers like Atari Force.
French comic Valerian is getting a movie decades after Star Wars took, er, some influence from it.
What I’m saying is there are a lot of spaceships in trouble in comics. (Especially from 1977 to the early 80s for some reason. Ahem.) Superhero universes pull in space opera pretty casually, as well as there being dedicated SF comics.
After all, Star Wars started with George Lucas not getting the rights to Flash Gordon...