I also like Alphaverse and Betaverse. Also, I can't seem to find a word anywhere in the English language that would best describe something that serves secondary to something being referred to as prime. Like what's the opposite of the word prime?
Yeah, i looked too. There's no good word in English.
If we like 'beta' for the new timeline then I prefer the 'Alpha/Beta' combo vs 'Prime/Beta'. It's just more logical.

And it's good and geeky sounding. And you can keep going through the alphabet as successive timelines are spawned.
Since there seems to be at least some convergence around "Prime" referring to Spock & the Classic Universe, it wold be nice to have a way to say "Second" in a way that has the same ring as "prime". "Second", "Third" etc, linguistically succeed "Prime", but those are awkward sounding.
I think the best you can do with "
Prime" is to succeed it with "
II".
I'm good with Spock/Kirk/Bones 'Prime' and 'II' for characters and 'Trek Prime' and 'Trek II' timeline/universe/reality. Though that might create some confusion with WOK, you could probably tell from the context. Technology could be Transporter 'Prime' and Transporter 'II'
I don't love "Nu" but it is catchy/catching. From what I see on other threads, it's looking like we will have a hybrid designation of "Classic" or "Prime" on the one hand and "Nu" on the other. Even though I don't love it, I actually want to use it because it's just so easy and we all know what we're talking about. But then what do you do when the
nu becomes
old?? (since "nu" is also a greek letter, you could maybe pick up the alphabet from there?)
I also like the 1.0 and 2.0 for the the two main universes/timelines, but I think using 1.1, 1.2 for the different series is a little confusing, since they can't so much apply to the characters/technologies.
There's nothing wrong with Abramverse per se, but a lot of the time you just need to talk about things 'in-universe' and if you're always referring to realworld authorship, it kinda breaks the 4th wall.
I don't like tying the whole timeline to Nero/Narada, even to those of us who liked the movie, the character is just too forgettable to have a whole timeline named after him.
And I really don't like just calling the whole thing "alternative" since it's just so amorphous and non-specific. It's kind of just throwing it in there with the all the other short-lived spinoff timelines from various series and other movies. Alt Uhura or Alt Enterprise could be any alternative. At least with the "mirror" designation, we know the exact universe. With any kind of "alt" i think you'd still have to specify that it's "The Alternative" that we're in now.
anyway ...
these are ones I'd be okay with:
Prime - II
Alpha - Beta
1.0 - 2.0
Classic - II
Prime - Nu