Speaking about who i believe have really high chances to be in:
KEN- I hope his alt is this
Becuase i hope they change his basic standard design, to push him a lil bit more far from Ryu
Some design keypoints must stay, or they ruin the iconic image of the character… example blond kinda long hairs, red main color etc
I will like if they make him with usual large red karate pants and black belt, but with something more western/modern as top piece, maybe
or
It will make his design line more heavy on the legs section, wich can work nice to show that he’s the kicks shoto.
Also i will like they rework a lil bit hair too, maybe an high ponytail
This imho will push him more far from Ryu and show that time passed, but he will keep look like iconic Ken
AKUMA- If he must be in (and sadly i think he will), PLEASE, at least on standard design push him away as possible from shoto-look
Something a la SC5 Mitsu can be perfect
ALEX- Rocky Jacket or MMA costume, official artwork by Capcom
JURI- Something like that. Also, long hairs Juri FTW
URIEN- Spartacus(tv series)-like gladiator costume or Agrippa (Shadow of Rome, PS2 Capcom game)
R.MIKA- Keep her sexy, but maybe as alt second costume they can give her a more classic pro wrestler look. As alternative i can accept a lingerie football costume