You all think too hard on "relevency" via recent games. Popularity in itself is a form of relevancy. Anything being actively brought up makes it relevant. SF isn't controlled like the Pokemon franchise, and Fire Emblem is. The only characters ever to be included BECAUSE of "a recent game" was Roy. You put too much emphasis on recent game appearances. Retros should show you guys that doesn't matter. IF it did, Falcon, and Lucario wouldn't return.
But, I'll move on. Ridley will be added, and we're now on the Mother and F-Zero franchise