Well, the US pilot who ends up in space could be Star-Lord.
Also fits the bio of Vance Astro (Major Victory) though. That being said, Major Victory might be too close for comfort to Captain America.
Well, they could always do what DnA did in their Guardians comic run; they could have the team find a time lost Vance Astro. It was a nice way to tie both incarnations of the franchise together.
I really liked the year 3000 approach because it offered a glimpse of the legacy of Marvel icons. For instance, the alien race The Stark who based their civilization around some Iron Man armor they found; the exodus of mutants from earth to create their own society on another planet; the hunt for Captain America's shield which led into a symbol of hope among the enslaved populace of earth. There's alot to explore there which could give some context toward adventures of Marvel characters which we'll never otherwise see.