I found what appeared to two full cases of 6 of this figure at Toys R Us this week. I assume it will be part of a promotion for Injustice which releases next week. Click through to see the comparison pics of both releases.
Injustice Batman was released in DC Unlimited wave 2 with Wonder Woman. You can read his review here: Injustice Batman.
Here are the in package pics and comparison shots of the first with the second release.