Huh, my rantings aside - seems these two pics just showed up on 2ch.

Indicating that while 5D’s had Riding Duels and Zexal had AR Duels, Arc-V will have … Action Duels! Seems the duelists will have to interact physically with the duel fields? Things like jungles and castles?

Also the new method of summoning is confirmed as Pendulum Summoning. It involves 2 monsters, powerful new effects and… doesn’t seem to say much else.

EDIT:

Also, the two humanoid monsters from the promo pic had text that referred to them as “Star Reading Magician" / 「星読みの魔術師」 (blond hair) and "Time Reading Magician" / 「時読み魔術師」 (auburn hair)