Above is apparently the "box art" for Blood Dragon, an upcoming (and seemingly downloadable) expansion for Far Cry 3. Take a good look at it.
It's as amazing as it appears unlikely, especially given it's April 1, but considering the title has been rated by both the Australian and Brazilian classification boards (it has a "high impact sex scene"), it looks like it might be an actual, real thing.
A thing that's evoking the 80s like it knew the decade first-hand. Sci-fi ninjas, giant Godzilla things, a tribute to Michael Biehn, all that pink. Amazing.
A list of achievements for the expansion have also turned up, and suggest there are new weapons, new enemies (including dragons), VHS tapes and the ability to "Reach Maximum Level and Become the Ultimate Badass".
FAR CRY 3: BLOOD DRAGON ACHIEVEMENT LIST [Exophase]
Computer Games Bulletin [Australian Classification Board]
New Far Cry: Blood Dragon box art leaks, is greatest box art ever [milkybar1983 @ NeoGAF]