According to Fusible.com, the domain was registered privately, but the whois.com records show Take-Two as the owners. The site’s domain servers were also recently switched over to Take-Two’s.
Currently, the domain doesn’t actually go anywhere. It just delivers a blank page.
With a name like “Hung Over” it’s a safe bet Rockstar would be attached to the project if it’s real. Rockstar is bringing GTA V to homes this September and with a confirmed sequel to Red Dead Redemption in the works, it would be difficult to produce a new IP. Stay tuned.