Marvel Comics has debuted (via Newsarama) solicitations for Avengers #672 and Champions #13 that reveal a crossover between the two team-up titles, called "Worlds Collide."

Both written by Eisner-winner Mark Waid, and with art by Jesús Saiz and Humberto Ramos, "Worlds Collide" marks the first crossover between flagship Marvel Legacy titles. The previously-announced Marvel Legacy crossover, titled "Mojo Worldwide," will run through X-Men Blue and X-Men Gold.

Take a look at the solicitations and covers for Avengers #672 and Champions #13 below.

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AVENGERS #672

MARK WAID (W) • JESÚS SAIZ (A)

Cover by ALEX ROSS

WORLDS COLLIDE Part 1

Following the events of GENERATIONS comes the long-promised clash between the Avengers and the Champions! The countdown has started as the High Evolutionary, a twisted scientist determined to create a better world at all costs, sets the Earth on a collision course with destruction! The Avengers and the Champions are ready to meet this threat — but will their first cataclysmic clash deter them from Changing the World?

CHAMPIONS #13

MARK WAID (W) • HUMBERTO RAMOS (A/C)

WORLDS COLLIDE Part 2

The titanic clash between the Champions and the Avengers continues! Since they were old enough to say the word “Avengers,” the Champions have idolized Earth’s Mightiest Heroes. Now the two teams are on equal footing — and the Champs must walk the walk alongside their former mentors! Will their experiences in GENERATIONS help them — or tear the two teams apart?