- PSN+ version (with 12 characters unlocked, some small stuff for users for a whole month)
- Super SFV (all S1 characters plus all 6 S2 characters, even through in some classics if not 6 classics, whatever maybe Sakura, Sagat and 2 others people want)
- Arcade Mode
- Story Mode + Story Mode 2 which focuses on Akuma
- Renewed marketing push
- SSFV launches at $29.99
If they want even more sales they can up it by doing a 3rd Strike-like change to distance themselves from the base game. 3rd Strike looks completely different from the original SF3. New music, new aesthetic, new feel, new vibe. Do that with SFV and that might make people think "yo, this is a new game, I love this" and see what happens. Equip it with new stages and such. Give it more unlockables, stuff like that.
Whatever works. If they did this? I'd actually buy the entire game over again.
I know, people will say "Capcom won't do that" and "that won't work" well SFV hasn't worked thus far from a casual standpoint at all. As far as I'm concerned, Capcom's trying to take these risks with 5 brand new characters and underestimating casuals, they need to do everything they can.