Like the PSP's Disgaea 2: Dark Hero Days and the Vita's Disgaea 3: Absence of Detention, Disgaea 4 Return is a portable update to 2011's Disgaea 4: A Promise Unforgotten. It's currently unknown what additions the game will see in its Vita incarnation, though if prior portable adaptations are anything to go by, you can expect new characters, new stages and a host of new items and equipment to complement the basic story elements found in its PlayStation 3-exclusive predecessor.
There is currently no word on when (or if) Disgaea 4 Return might reach Western territories, though the series' popularity in North American and European regions should ensure it receives an English-language localization at the very least.
Sony PlayStation 3 (late 2012)
Sony PlayStation Portable PSP-2000