Ash's death battle opponent and teammates are...
???: "..." (Holds a poke ball and throws it)
Charizard: (Comes out and roars)
???: ... (Throws another poke ball)
Mewtwo: (Comes out) Do not attempt to defy me...
Then, his opponent is revealed.
Red: ... Let's have a fun battle.
Ash vs Red, releases on Sunday