Valiant released a teaser image for an event/promo/tag it will introduce in May 2014.
Robot Overlord
Warning: Pregnant women, the elderly, and children under 10 should avoid prolonged exposure to the Robot Overlord. Robot Overlord may suddenly accelerate to dangerous speeds. The Robot Overlord contains a liquid core, which if exposed due to rupture, should not be touched, inhaled, or looked at. If Robot Overlord begins to smoke, get away immediately. Seek shelter and cover head. Do not taunt the Robot Overlord.