How did the idea of Azura ever came to life anyway? She isn't as much of a main character, and having played Fates and completed all routes.. she doesn't hold all too much and never should have been considered before Corrin anyway. I could see either Azura or even Takumi alongside Corrin, but not instead of Corrin. That just wouldn't have ever made sense.
I still would like newcomers of Fire Emblem yes. And I would prefer not if they'd force down the FE16 protagonist on us before the game gets released. I much rather have Celica, or even Alm. Actually, I would prefer Alm over Celica cause after I played Echoes, I could litterally envision Alm into Smash far more easily. What difference does it make anyway... Robin also represents the Mage type units in Smash, so Celica isn't all TOO much more unique than him anyway. Especially since she's a downright Marth clone in Warriors.
Lyn is still a option that's somewhat of a pipe dream for me. And I don't care she uses a sword, she would use it differently than the rest of the cast. Ask
@ManlySpirit about this, he made a literal LEGENDARY moveset for her that was even once used as the base of Lyn's potential moveset for Project M, before it got disbanded. Plus, Heroes proves Lyn is insanely popular, and on par with the more popular Smash Lords like Ike, even beating out a couple of playable mainstays as Marth.
Timeless popularity > adding the flavor of the month.
Intelligent Systems already confirmed they will remake more games like they did with Echoes. It'll just be a matter of time before FE7 (and therefore also FE6 cause most likely they'll bundle the games, much like how they would bundle FE4 + FE5) gets remade, and Lyn is therefore "relevant" again.
There's a huge chance the next FE Lord is gonna be a "Chrom" anyway.
Speaking of Chrom, if Lucina gets reworked... I want Chrom as a proper alternative costume / sharing the slot of Lucina. That would be much, much, MUCH better than.... this.... ⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩