Where do you guys get the idea that the name includes the TV series too? They're in a separate universe, so I would assume they would need their own name separate from the movies. I like Berlantiverse since Greg Berlanti is one of the big connections, DCWUniverse isn't bad either, but if Supergirl does get incorporated into it then it would need a name isn't limited to just the CW. Not to mention the fact that the shows air on other channels in other countries.
For me, it just seemed like somebody from corporate trying to come up with a name different than Marvel.
It's ironic because, in fact, the term "extended universe" fits the Marvel model better (MCEU) because the television and movie programs are connected. DCCU would better fit that company because the plans seem to be to keep the cinematic and television universes separate.