
Fire Emblem Cuts
Excluding the Echo Fighters, the most likely Fire Emblem fighters to get cut in a future entry are Roy and Corrin (funnily enough being the two Fire Emblem DLC fighters in Smash 4). I'll start with Roy because he has the most going against him.
Roy's own game is nearly 25 years old and still remains Japan exclusive to this day. He is a semi-clone of Marth, so having a unique moveset can't save him. In fact, that and both of them having Echo Fighters only contributed to the "too many Marths" stigma fans have towards the FE representation in Smash. And finally, he has been cut before in Brawl, so the precedent of him being lower priority was already set. Onto Corrin, Fire Emblem Fates is one of the most divisive games in the FE fanbase. Corrin themself isn't a very popular character either given their lack of a personality in Fates. While Corrin's moveset is unique, it doesn't differ too much from other FE characters as compared to characters like Robin and Byleth, who have more unique movesets than Corrin. When people defend Corrin they always ignore Corrin having your usual down b counter coupled with generic sword swinging attacks.