EA has said the reason some concept art for a tank in Command & Conquer: Tiberium Alliances looked so similar if not identical to Games Workshop's tank in Warhammer 40,000 was due to "an accidental exposure of concept art."
According to a statement given to Gamespot:
"Games Workshop and EA are aware of the IP issues around the artwork in question, which have now been resolved," an EA representative said.
"The artwork was internal EA concept art that was unintentionally released publicly. No Warhammer 40,000 tanks have ever made an appearance in Command and Conquer: Tiberium Alliances, and never will. Games Workshop and EA continue to have a strong relationship working together on Warhammer Online: Age of Reckoning and the new free to play game Warhammer Online: Wrath of Heroes which just entered open beta."
Yesterday, Reddit users Bro-jangles and corevirus posted shots showing the similarities between the Grinder and Bombard tanks featured in promotional art for Tiberium Alliance and the Ork Bonecruncha and Imperial Guard Baneblade vehicles.