If I am correct, Jericho is set to return to the WWE at some point in January which gives him the chance to be a Surprise Entry at some point during the Royal Rumble match.
Jericho Returns and wins the Rumble.
Ziggler cashes in successfully and wins the WHC.
They go on to face each other at Wrestlemania for the WHC.
Gives them the opportunity to finish off the feud that started before Jericho went off on tour with his band and could eventually give Ziggler the push he needs to stay up there in the Main Event if he retains at 'Mania.
Probably won't happen, but it was just something that I thought may be a slight possibility.
Jericho's last chance in winning the Rumble was last year,He'll never win the Rumble now.The guy is done with the WWE and the WWE won't push him for shit even if he does come back,If he does come back the guy will just put guys over.