Being one of the few people that knows Kreu's canons - both the original and the CRAU? I question the viability of a canon update. Unlike the Flutters, when Kreutzer came into WW she was good and dead in her canon, and said canon very much does not do that whole "come back to life" thing.

We're talking FMA levels of "do not try to bring the dead back" here. Plus, as far as I know, once Zecora took over as Composer in WW's (implied) epilogue, Kreu stayed behind as a Reaper. So, yeah.