Has SCVI revealed Cassandra yet? I forgot what else they had for Season 1 since Amy. It's pretty much a no-brainer to have a Season 3 for Tekken 7. Namco's not going to release a Tekken 8 until next gen most likely.
Free Step Dodge
Force_of_Nature
Radiance
Cassandra most likely is coming to season 2. Her, Setsuka, and Hwang were HIGHLY requested. It would be silly to add anyone else.
MegaMegaMike
You're likely to only get Cassandra, since I don't think season 1 is finished yet. Also, Capcom doesn't need to "save" SFV. It's old and still doing fine. And the 3 characters are going over well so far.
Radiance
SFV needed saving out the gate. It's only doing so well because of it's name and reputation.