japanantors DBO sources arn't good. btw This is what the producers have told the japanese public and korean public so far.
the races are namekians, sayians, humans. namerkians start on new namek. humans and sayians on earth guided by 'time patrol trunks'. you can choose to be an adult or be a kid and grow up while palying the game. You can fight with other palyers. you can make your own clan group. beable to buy sensu beans, Cloths, swords. The only enemies that the producers have told of are the sayamen, various 'alien scum', Dinosaurs(of original Dragonball). Also the aindroids were discussed for being a 'Maybe' for a race aswell as a enemy (android #33,34,35 and so on. 33 is told of as the weakest "level" ,this is wierd because in the shows, the numbers are just names and dont have any meaning for there power. Also there is to be a new enemy race of alien in the game. This info is officialy from the namco bandai company team and others working on the production of DBO.