As has been the case with teaser campaigns from the various publishers, any promo that continues for more than a day is going to have a payoff at some point. For Image Comics it just may be the latest teaser for events building up to Invincible #100.
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.