Capcom announced late last week that they will be bringing a demo for MotoGP 09/10
to both the Xbox 360 and PS3 about a month before launch. The demo will feature the Mugello track and three bike classes and allow you to compete in Championship, Time Trial or Arcade modes.
As for the DLC, Capcom is bringing us the 800cc bike class, all rider and team liveries and the two new tracks for the 2010 season at Silverstone (UK) and Balatonring (Hungary.) The second free DLC will bring about the 600cc and 125cc bike classes as well as all rider and team livery updates. Both DLC packs will be available pretty quick after the games release in March.