After the news about reissue Hotrod being a Walmart exclusive a few weeks back (and showing up in Asia), three more Gen1 reissues have been found listed at Robotkingdom, listed as Walmart exclusives.

Starscream - packed with a mini Megatron gun, about US$40 for July.
Devastator - about US$90 for Juy
Minibots - four different ones (Bumblebee, Swerve, Tailgate, Outback) at about AU$10 each, for August.