I imagine that the naming policy will follow the traditional restrictions in gaming. No Aragorns, Luke Skywalkers, etc. Play on names, however, is likely allowed; ala Aragrond, Puke Groundrunner, Darth Wanker, etc. Further restrictions based on lewd or blatant cursing is likely to also be removed.
My question is whether my name will be considered unlawful when I own the copyright to it. :P
There really shouldn't be any surprises to the naming policy. Good taste is hard to enforce, so don't be surprised to find something you aren't fond of.