I'd guess, assuming they don't consider Steamroid too powerful to be at 3 (I'd ASSUME they'd allow it, though we still don't have Goblin Attack Force for some reason), that the next Syrus event will probably have Steam Gyroid, Steamroid and Gyroid available. (The new Crowler event discontinued several Supers and Rares, and it would make sense for Ambulance Rescueroid to be cut.)