Hey there, I'm Hannah, and I have Bucky here. :) MCU Sam would be very welcome to have around. Bucky wasn't that close to previous 1610 Sam since he had a much different history, but he'd be glad to have MCU Sam around.
Late last week, I updated Bucky to be caught up with the new show, so if you have Sam from there, Bucky is all set. With old Sam being different canon, Bucky hasn't really told anyone yet what came with his update (he probably will/would eventually), so everyone else in game would be fresh with that new info re: Sam.
Feel free to poke me on my contact post if there's any plot you'd like to hash out.
My only other Marvels are Amy Bendix from MCU: The Punisher and Laura Howlett from Logan. Neither know him from canon (Amy may just know him from the news) though and no big connections with previous Sam in game.