Well, we got six Fire Emblem characters, and Wario tends to outsell Fire Emblem...
So perhaps in future, we might get the same thing! Can you imagine the hilarity if Fire Emblem gets two reps, and Wario gets six? The salt from the Fire Emblem fans would be awesome...
But what do you think?
Nah, we won't get it any time soon because for all that they have their own symbols in Smash, DK, Wario and Yoshi are considered subseries of Mario, and adding 5 Wario characters would thus be adding 5 to the already impressive count of 10 for the Mario series... which might get it's own new rep. and then add in a plausible Dixie or K.Rool and that gives us 17 Mario reps to Fire Emblems 6.
With that said, I'd add these 5:
Waluigi(if considered a Wario character) is my #1
-Ware
Ashley & Red(they'd get in as a duo, though maybe under just Ashley's name)
Fave Ware character, has been getting the most exposure lately and is likely the Ware character most likely to actually get in if any of them do.
Jimmy T- Second fave. His moveset would also almost certainly be incredibly fun. DISCO FIGHTER!
Mona- Not that fond of her, but she's probably the biggest name of the characters that were in all the games, and I feel she'd be deserving.
-Land
Syrup
Extra if Waluigi doesn't count:
Dr. Crygor/Penny Crygor- Tons of fun moveset potential. Not super fond of either.