This isn't a game about fan favorites. If you want a VS game that includes characters you want it's called MVC3. MVCi is about including characters to maximize profits in other sectors or IPs. Gene and Asura are characters from dead IPs they'd have to make from scratch.
Here are all the new characters in MVCi
Ultron (age of ultron)
Captain Marvel (Upcoming solo movie)
Thanos (Upcoming avengers movie)
Gamora (MCU gotg)
Jedah (Probably because Ono is a big DS fan and is pushing internally for a new DS)
Monster Hunter. (Big MH game coming to the west)
Megaman (most requested character on both sides, probably had a game in development, but cancelled)
Everyone else is a modern day sprite dump from the last game sans the X-Men/FF, Viewtiful Joe, Wesker, Virgil, PW, and anyone with a vagina.
DLC is
Black Panther ( upcoming solo movie)
Sigma (megaman villain, part of the main story)
Wouldn't expect Gene and Asura ever. Unless there's some revival happening for their IPs.