Could have Super DI. Trade half a bar of super to be invulnerable to the next attack for a few frames once while you're in hitstun. The trade off would be that if your opponent throws out a quick move and you super DI it, they could still follow-up with another attack on whiff before you're out of hitstun. They could also just use an attack with a lingering hitbox to outlast the i-frames like 1000 cuts or flame wave. Got the idea from cross-counters.