it's probably mei becoming espada, especially when Daishinji gave her espada's sword in this past episode, it's not much but it's signaling that they are setting her up to become espada, it's pretty late in the game for a new character to take over espada.

That’s assuming anyone becomes Espada...
While I do assume someone will, it’s not like they’ve explicitly stated we are getting another one.

I hope it'll be Mei. She deserves development like this!

Why everyone assuming that Mei will became Espada?
She even didn't know how to wield a sword let alone fighting!

TBH,i can't wait for the next month magazine scan!
I predicted that Falchion user is still Bacht and for Logos i think he will not becoming a rider he will become Megid instead!
Strongest Megid probably

Well we've already seen Bacht on set, as well as a twelfth rider who's been seen fighting against Slash, Buster and Blades. So you're right on one count, but it does look like Master Logos is becoming a 'last boss Rider' a la Evol, Cronus or Gold Drive.

neither did touma but he morphed and fought a like a swordsman the first episode why? because powers of the kamen rider make you good fighters. it's been that way for years, you dont need 5 episode fighting lessons to become a rider.

I can see Kento becoming Espada again and mastering Ikazuchi in a post-series V-Cinema or he returns to being Espada in the last quarter of the series.

The Calibur sword then returned to Yuri who will again dual wields with Saikou.

The show explicitly called attention to the fact that Touma using the sword would normally be impossible and has hinted that he has a greater destiny upcoming. Mei, as far as he show has gone, is just an ordinary woman hanging out with the heroes.

we'll see.