US site Yakface.com have shared this image from one of their site readers of a 3.75" Black Series AT-ST and Driver found in a Walmart store. The price was listed as $60.
There are no more official details at this stage. We can assume this is still under Walmart exclusivity as per the 3.75" Black Series figures, which should mean this at least has the potential to make it's way to UK Asda stores.
Additional images have been shared, via a listing on eBay, which do confirm that this is not a specific release but a general AT-ST (we did assume with the weathering this might be a Jedha themed release). The AT-ST driver will come with removable helmet. Both appear to be re-releases from the Black Series Endor pack from a couple of years back that was a US Toys R Us exclusive.