Skinny!Steve is a regular guy who turns out to be the scion of a line of asshole space royalty. Sam Wilson is his hot bioengineered bird man bodyguard. They have space opera adventures. You don't have to exactly follow the plot or premise of the movie, I just want the adventures of space princess Steve and space bird soldier Sam. Feel free to include other Marvel characters as well.
Steve/Sam, Jupiter Ascending-ish AU