That's interesting.
That should be those Movie toys that we still don't actually know what we are getting released (other than the four wave 1 Deluxes, and some leaked images of larger figures. Those Kmart shelf tags though would just be Deluxe and Voyager (at this stage), but unfortunately, it doesn't mean that they will be arriving any time soon, as they had shelf tags up for the that large Rescue Bots dragon Bumblebee last year, but the toy didn't show up for about a couple of months.
I would also expect that we would see these released somewhere in Asia first, before they show up here... but you never know.
(not sure why Hasbro are calling these toys Movie 6 (MV6), as this toyline has nothing to do with the Bumblebee movie, which will have the MV6 title tags to it)