Moondragon is a telepath that can transform into a massive dragon. Phyla-Vell is the daughter of the original Captain Marvel and uses a cosmic sword, also was Quasar for a while. Captain Universe is basically a cosmic entity. Vance Astro is essentially Space Captain America. Jack Flag is essentially Space Union Jack. Bug is a Micronaut who uses a staff to fight. And Cosmo is a Russian psychic dog in a space suit, and he already made a cameo in GotG1's post-credits scene.
I haven't even heard of half those other Guardians. Man, so much potential. Regarding Yondu, he already has a comic costume in the game (ANAD I believe), so I'd expect either a movie one or just nothing.
And I mean the original Yondu: