DailyMTG.com Editor-in-Chief Trick Jarrett announced on behalf of Wizards of the Coast that the next duel deck box set will be...

Heroes vs. Monsters!

The flavor of the new box set, featuring two ready-to-play sixty card decks, was announced in their release:

"Monsters worthy of legend have always threatened the civilizations of the Multiverse. Heroes of many worlds must prove their worth by confronting these immense creatures. These heroes grow stronger with every encounter as they assail threats beyond their imagination.

Materializing out of the mist, monsters loom large on the horizon. Terrifying and relentless, these mythical creatures ravage the countryside. Enrage your monsters into jaw-dropping monstrosities and send them rampaging toward the enemy."

In addition to reprints, Duel Decks: Heroes vs. Monsters will feature six preview cards from Theros. The hashtag for discussion for this exciting new release is #MTGHVM and will be released September 6, 2013, in English and Japanese.

To read the full announcement, visit DailyMTG's announcement page.