If you were creeping on the 40k FB page around Custodes/TS release, you likely saw the #1 model that TS players were talking about: Rubric/Sorcerer plastic dreadnought. It is, without a doubt, the one thing that TS players were universally asking and hoping for and GW saw it. In fact, they were blocking people who kept asking lmao. Maybe, that's something they'd release.
Otherwise, I am not hoping for any new models.. Just updated rules. This is just my opinion but I kind of like the boring rubric spam, with sorcerers and some random armor for support- Just need some help with casting better and doing more tricks like in the codex/fiction. Perhaps it will come now.