I think the chest plate in particular has a skull-esque armour look to it imo, which is part of the reason I like this mould, for Bludgeon. With the tank mode the colours make it look a decent Overlord, but I see no relation for the robot mode.
Remember that this is Shattered Glass Overlord, so perhaps 'Overlord' is too nasty a name. Perhaps the angle the club will follow is his incredible honour and he faces his Evil Decepticon counterpart 'Overlord.'
Me no likey so far. Getting the set hinges on the other figures. There has better be some awesome stuff.