At WrestleMania 1, The Undertaker did not wrestle anyone. The Undertaker wasn't in a WrestleMania match until WrestleMania VII (7).
Shawn Michaels will face undertaker at wrestlemania XXVI
Edge
No one knows that yet, but at WrestleMania 27, Triple H will face Undertaker.
The Undertaker defeated "Superfly" Jimmy Snuka in his WrestleMania debut.
The Undertaker is coming back to WrestleMania 32 to face Sting and then retire the day after WrestleMania.
john cena
Shawn Michaels
Triple H
Randy Orton
Yes
He will beat HBK at wrestlemania 26