If (and that's a big if) obr are the launch faction for 5e they should go full weebshit samurai whatever with them. It's a popular aesthetic that is basically completely absent from warhammer nowadays. Tau are the only ones that somwhat come close and even then it's 95% gundam and maybe 5% classic weebshit sprinkled in.
Guaranteed money maker if done right. Gw i'm available for a market consultant position btw.