Batman

[what is a gaga ?]

[dizzyshot]

I like Batman. I don't however feel that this card reflects Batman in any sense. I feel like your reflecting on his tool belt rather than the hero himself. Speaking of which his ability of leaving the field is similar to Stardust Dragons with the draw backs of loosing Xyz material. Which moves me on to my second thing I wanted to say. His ability with the Xyz material makes him able to destroy, well all face up monsters and Spell/Trap cards. This may seem good, but that includes your monsters and giving the "your opponent can't activate effects in response..." ability may seem good, but your opponent can easily have a Mirror Force ready to counter Batman's inevitable attack. You could activate his first ability, but then you wasted all that time to get him out on the field and know you lose his abilities. I just don't see this as easily playable. I would recommend this best used in a dragon deck running Parsec Dragon or similar. 

[Flash Flyer - Sakura]

Next time, post the lore underneath your card. Didn't you bother to read the rules about it?
 
Anyway, OCG fix, then I CnC your card.
 
2 or more Level 8 monsters
When this card is Special Summoned, except by Xyz Summon: Discard 1 card from your opponent's hand (the card is chosen at random). When your opponent declares an attack or activates a card effect: You can banish this card. During the End Phase, if this effect was activated this turn (and was not negated): You can Special Summon this card from your banished zone. During either player's turn, you can detach 1 Xyz Material from this card; negate the effects of all other cards on the field, and if you do, destroy them. Your opponent cannot activate card effects in response to this card's activation.

 

OK, so it has an effect that banishes itself when your opponent even does anything; and when it does, your opponent loses a card from their hand. Unlike Shooting Star or Stardust, it doesn't do anything worth noting, so either you're using this card on your own turn; or when you can afford to take some damage. I know it's setup fodder for its discard effect, but...

 

Last effect is essentially Exciton on steroids; it negates other cards on the field and destroys them, opponent can't do anything about it and you still have a walking 2500 beater to hit them with. Do I need to mention what Exciton is capable of doing, and then have you figure out how Batman is essentially a superior version of said card? Yeah, you'd use it to kill your opponent's backrow and/or swing for game.

 

Also note that Rank 8 monsters aren't exactly hard to bring out in certain Decks; there are quite a few R8 decks out there (Photon/Galaxy, some Dragon decks [but synergy problems], Gimmick Puppets and so on).