The fan-vote combiner Victorion might be a ToysRUs exclusive in America, according to a tweet by TRU, which has them revealing character bio info later this week... and they'd only be promoting a toy they are releasing.

Victorion was suspected to be an exclusive somewhere, and after Quickslinger and BrakeNeck were internet exclusives to multiple stores, this one could be the same.

No idea if it will come here though, but there has been more media exposure for this fan-vote toy than those two limbs, so the combiner could show up here.
And if it is a TRU exclusive, it is likely to be around the time of the SDCC in July, as they like to pre-sell their big exclusives at that event.