Oh they are definitely keeping it, my SA told me last week that they've just sent the ones they have at the boutique back because there will be a new model and they will get that one. That was even before the Apple event was officially announced...of course the rumor of a new watch has been around for a long while
So yes, if you want confirmation - there will definitely still be Apple Watch Hermès. One thing though is all rumors seem to say this will not be a significant upgrade, so it's less like a Apple Watch Series 5, but more like a Series 4.5 if that makes sense (still all rumors before the official event though).
I wouldn't be surprised if there are new bands in any case!