Dengeki PlayStation has a list of stuff included in the next wave of Disgaea 4 downloadable content. Disgaea 2: Cursed Memories leads Adell and Rozalin are on it. Each of them will cost 300 yen ($3.50). Asagi a "protagonist from another game?" will be available on the same day for just 100 yen ($1) and proceeds from a DLC purchase will go towards restoring areas damaged by the earthquake.
Disgaea 4: A Promise Unforgotten appears to have more than downloadable characters… and scenarios. You can get a Toro shaped weapon for free. The magazine also mentions Laharl Ship and Holt Village as paid DLC too. It is not clear if these are parts to decorate your pirate ship and hub world or something else.
Nippon Ichi is also giving an Oppai1 Love Love Custom Theme for PlayStation 3 away for free too. All of these items will be released on April 28 in Japan.
1Oppai is Japanese slang for boobs.