In America, a new bonus pack has been found at Target stores labelled as an exclusive.
It's a re-release of the Ark playset with a bonus Sentinel Prime (Cmdr class). It still has Roller, and the Sentinel Prime appears to be a re-release as well... so no incentive for completists to track this one down if they already have both.

No mention of the price though.

It could also be something we'd see here in the lead-up to Christmas, as it is a store exclusive... which are doing better than the general release line toys.