The report itself showed how nice and timeless the Double Arrow has been.
I hope for an SBB style livery. Simple and classy.
Pushing for NSE to be back I find to be stuck in the past. The logo is dated, the livery is too (as much as I loved it on the Networkers). Downham Market is nice and all, but do we really want the entire SE to look like that? Same for InterCity. I'd like an updated Swallow logo, especially for HS2, but going back to full on 1980s BR branding isn't going to happen, nor should it.
The GBR name does feel like Tory British nationalism, simply because they have form for it. A lot of people simply don't want to fly a UK flag because they aren't British unionists or find it OTT, and that's OK - we are supposed to be a democracy with individual nations after all. Calling them unpatriotic or "commies", as if this is 1960s USA, just hardens the view of some that the biggest union flag wavers are an intolerant bunch. Sometimes I think it's only the flag/"we're the best" that keeps the USA together, and that's what Westminster (mistakingly) think they can do here, along with the "our culture is under threat" nonsense.
In reality, GBR will probably just be referred to as "GBR" and "British Rail" by the average person, because it's easy to do so.
For the logo, I expect something like:
Double | Great British Railways
Arrow | Southern
I do wonder when the brand will start being rolled out. As a few stations are planned to open within the next 2 years, it'd be sensible to start there...