Yes, but WHY? What's the bloody point? Why have an alternate universe one appear? Alternate Supermen, that made sense. Where-else did we have alternates appear?
Personally, I smell a cancelled project. I think DC was planning to bring Orin back to cash in on Brave and the Bold, but Johns probably wanted to use Orin as a BL and had them push back/cancel. It's not like Aquaman has ever been a best seller. Just one of the most continually revived series in DC history.