A Mysterio figure wouldn't surprise me at all for Spider-Man.
I can't really think of a 7th character for Guardians of the Galaxy except maybe Thanos.
I would love it if they've taken into people's demands (mainly mine) and the reason we don't know about these characters are because they didn't originally intend to do them and it's a Deadpool figure
Who is playable in every playset because he's Deadpool. Ahaha.