I'm going to try not to be spoiler-y, mostly because I don't think anything in Catalyst is even spoiler-worthy. It's a boring story that just makes you get to know the characters from Rogue One....

But anyhow, in the audio book's chapter 14 (maybe actually chapter 13), Krennic is meeting with Tarkin and they mention the newly completed DREADNAUGHT!

Krennic says how it's already obsolete, but Tarkin says that it'll do fine as a placeholder until the Death Star is complete.

I don't know if they talk about it in further detail, as I didn't get much past that part yet, but that is awesome regardless!!!