Thanks to DrunkWooky for this.
Aspen announced the pre-order date and time for Harley Quinn, All-Star Batman, and Suicide Squad variants a few days ago.
It appears that these variants will also be Michael Turner variants! It looks like we could have another Batman #1 Turner variant situation going on in a week or so with Harley Quinn!
As a follow up: it’s unconfirmed but Aspen Comics has been posting the following Harley image from Michael Turner on social media.