The Hostage Negotiation DLC pack for Max Payne 3 is to be released on October 20th, following some confirmation by Rockstar. It will be including four new multiplayer maps, new items, weapons and a new avatar faction.
Club Moderno and Estadio Do Galatians are the names of two of the maps that have rubbed off the ideas from earlier levels in the game. They will be set in nightclubs and a stadium respectively, and are to offer a unique outlook.
The other two maps are called O Palacio Strip Club and Favela Heights. I think the name says it all for them both. Remember that it will be arriving on XBLA for 800 Microsoft Points, as well at the PS Store and PC for $9.99.