The Cosmic Cube is one of the most powerful weapons in comic book history, as this website stated, 'The Cosmic Cube are powerful objects which stores reality altering energy. The Cosmic Cube are able to rewrite reality and do virtually anything it's master wishes. Its master is able to create planets, augment or negate other people's powers and skills, and so on.' But it was only in the marvel universe, what will happened if one landed in the DC Universe. Who will get it and use it? What will they try to do? Who will try to stop him/her? Will this start a Cosmic Crisis? And if so who will DIE?

darkseid would find it and rule earth with an iron fist...and a cube !!!

Joker would find it and do unimaginably horrible yet highly entertaining ways

Probably the same Darkseid did with the Anti-Life Equation.

Hey guys, it was actually used during the JLA/Avengers #1-4 as a plot device in 2003.

I also think that there may be a 1% chance of a marvel/DC crossover coming soon to a theater near you. The Cosmic Cube has been used before by Krona (who will be part of Parallax in Green Lantern this summer) which caused the DC and Marvel universes to intersect. The cosmic cube is currently in play for the Avengers and Krona is being used for DC.... we shall see!