I told you not to get too excited. The next Uncharted game will be a "casino/card game", according to its Brazilian ratings clasification.
Called Uncharted: Fight for Fortune, it's for the PlayStation Vita, and given its lack of marketing to the point where it's being revealed by ratings boards, you can bet it'll be a fairly simple and cheap affair.
PPg. 31. Seção 1. Diário Oficial da União (DOU) de 26/09/2012 [JusBrasil, via videtonator @ NeoGAF]