A broken clock is right twice a day.
That said, I’ll just take it with a grain of salt, as leakers have been wrong, and right many times before.
So-called leakers were right about Dark Samus, Chrom, Simon, Isabelle, Incenaroar, & Ken, but those were already popular fan choices already in every guess list, or “leak.” So could be lucky guesses, or coincidental.
(Surprised nobody “leaked/guessed” Richter Belmont. As he’s somewhat popular for appearing in “Symphony of the Night.” If those were legit leaks, they should’ve known about him, or wouldn’t have false characters like Shadow the Hedgehog.)