4 ways The Undertaker could respond to John Cena

#3 Lights out

Could Undertaker appear from within the darkness?

This is the most obvious one and let's be honest, this is the one that WWE will probably go with. Cena will keep calling out Taker until the Deadman can't take the goading anymore.

The lights will go out and Undertaker will be standing there, ready to stare Cena down, ready to head to WrestleMania, probably for the last time.