It’s official, Rising will get downloadable content at some point following its release.
Although details are scace, we know that some of the DLC will be VR missions and special sub-missions. No pricing information as been revealed yet. This is speculating, but we could see costumes as part of upcoming DLC; North American gamers will probably want to play as Gray Fox; a pre-order bonus for UK players.
Metal Gear Rising Vengeance releases worldwide on February 19th 2013. You can try the game for yourself through a demo on Xbox Live or when purchasing Zone of the Enders Collection HD. If neither of these fancy your likings, you can also read a demo impression.