Honestly, jump back 2 is what I would usually do in this situation (Well, actually I avoid this situation and always go with OTG resets against Shazam, but yeah...). If you read the teleport, then free full combo. If you guessed wrong and he does another wakeup, then the teeth punish the command grab and you land fast enough to punish the torpedo (Although he does get out of the corner). If he decides not to wake up, then he has to block teeth, leaving you at massive frame advantage and allowing you to pressure him in the corner again. If he wakes up with a jump, land and do a D2.
Jumping back after the teeth essentially allows you to react to what he does.