With all the recent posts about the EW049 Green Arrow's kryptonite arrow special attack power, that the hit target can't use defense powers until your next turn that are only showing in the defensive slot (not defensive powers that are traits, super senses or defensive powers picked by a pick a power figure). I was wondering does Captain Cold's Absolute Zero special attack power work against speed powers not visibly showing in the speed power slot?



ABSOLUTE ZERO: Captain Cold can use Barrier and Toughness. When he uses Barrier, he may move up to 3 squares before placing blocking terrain markers. Characters adjacent to one of his blocking terrain markers can't be given actions to activate speed powers.

No. It does not. And that is for the same reason as Green Arrow's Kryoptonite Arrows only affect powers in the defense Slot. "Speed Powers" are powers showing in the speed slot. Nothing more, nothing less. Had it meant any speed power on the PAC, regardless of source, then it would have said "standard speed powers"