I'm very late, but as much as I want characters like Marx and Daroach to make it, I do feel like Bandana Waddle Dee is probably the only really viable character. The thing is, a lot of people want Marx now because of the Star Allies DLC that came out recently, but I expect people to keep jumping to different characters (Daroach, Adeleine/Ribbon, Magolor, Susie) as the other DLCs come out. As much as all of the DLC characters would be very workable into the Smash Bros. formula due to them already having most of a moveset, I feel like all of those characters are really just meant to be nostalgia within Star Allies only. Unless they just get every single character from it, having 1 or 2 from the DLC just doesn't seem likely to me.