Batman (Bale) and Spider-Man vs T-800 (Terminator 1) and T-X
Skynet is destroyed, but it made one final attempt to stop the Connors (John having survived the July 4, 2032 assassination attempt on his life) by sending a Terminator and a T-X back in time.
There is, however, a one-in-a-trillion chance that Skynet can goof up and send the two Terminators in an alternate universe.
Skynet realizes its f--kup shortly before it is finally wiped off the face of the destroyed Earth.
The AU is that of a combined Marvel-DC universe.
The Terminator and the T-X finds itself in New York City. After pilfering some clothes, the two last remaining cyborgs began their final mission: Eliminate John and Katherine Connor.
Too bad they didn't realize its master had royally screwed up big time.
Meanwhile, Bruce Wayne, playboy extraordinaire and head of Wayne Enterprises is in NYC on Wayne Enterprise-related business. He even woos Gwen Stacy into being his date for the big charity ball.
Funny how those two look a lot like the Connors.
Jameson has Peter Parker working the charity ball, promising big bucks to whoever gets premier shots of Mr. Wayne.
This also catches the attention of the two Terminators.
The ball is being held at one of the hotels owned by Wayne Enterprises. The charity ball is in full swing when the T-800 and the T-X crash the party.
Both Bruce and Parker duck out of the area just as the two cyborgs began to massacare the police and security.
Just as the T-800 is about to snuff out Gwen, he is bushwhacked by the Dark Knight himself, Batman.
"Nice costume," Spider-Man quips as he hangs from his webbing. "You gotta tell me who is your tailor."
"Who are you?" Batman demands.
Spidey looks shocked. "You don't know who Spider-Man is, Bats?"
"Spider-Man, huh? Where's your other 8 legs?" Batman responds.
By this moment, the ballroom is cleared out, leaving the two heroes and the cyborgs alone.
"Think you can handle the big guy?" Spidey asks as he faces T-X.
"I'll manage," Batman replies. "And it's Batman to you."