Im glad that I just read ITF's quote, I was about to go NO!!! BATMAN AND SUPERMAN ARE FROM DC! But after reading that quote I wont. Oh... wait a sec...
NO!!!!! Superman and Batman are both under DC comics. They are in an entirely different world. Such as Smallville and Gotham City respectfully. Marvel uses our world for the names of places. such as NY. PS Marvel is way better
To be fair there have attempts to combine the 2 universes. In one epic battle Superman is forced to turn The Hulk into a crater to save Lois. And would you believe old green skin got in a good sucker punch before getting slammed deep into the earth!