The UX is TNGA-C too, right?
Yes, it is.
Looking online, this site had some interesting materials regarding the TNGA rollout plans:
Toyota Motor Corporation Site introduces "TNGA". Toyota is shifting toward a "mobility company" in this once-in-a-century period of profound transformation. We are striving toward our goal of realizing the future mobility society. With an unceasing passion for beloved cars, we will remain...
global.toyota
That in particular has "compact class" as the focus post LC/LS. This would support the idea that they aren't done with the platform rollout for compacts with the UX (we haven't seen any e-TNGA cars announced yet, right?), and the UX may indeed be the first fully electrified option.
I don't think any of the TNGA architectures are "done" yet. And that graphic only shows a fraction of the TNGA products launched. The
Mid-size class is TNGA-C. Besides the Prius, C-HR and Corolla shown, TNGA-C includes Lexus UX. The
Full-size class actually comprises 2 separate architectures: the transverse-engine, FWD-centric
TNGA-K and the longitudinal-engine, RWD-centric
TNGA-N. Besides the Camry shown, TNGA-N includes Toyota Avalon, RAV4 and the new-for-2020 Highlander, plus Lexus ES. The Toyota Crown is the sole TNGA-N offering. The
Lexus (premium class) is, obviously, the LS and LC's
GA-L. The
Compact class is the yet-to-be-launched
TNGA-B (hence, no illustration) for the upcoming next-gen European and Japanese Yaris. The latter's introduction should happen sometime between late October of this year (Tokyo Motor Show) and early March 2020 (Geneva Motor Show).
From my understanding, Toyota and Lexus will launch their battery-electric offerings with variants of the existing Toyota C-HR, Izoa (a Chinese market near-identical C-HR twin) and Lexus UX, the latter expected to wear UX 300e badging. The dedicated-electric e-TNGA platform comes later (maybe early 2020s), and all we've seen on that front is the 6 clay prototypes revealed in early June as shown below:
Oh, and that TNGA Mobility page that
@CRSKTN linked in his post contains this eye-opening passage:
TNGA So Far
Toyota began its TNGA initiatives with the development of the fourth-generation Prius (launched in Japan in December 2015), leveraging the fruits of these initiatives to create other mid-size models: the C-HR and Prius PHV in 2017, and the Crown and Corolla Sport in 2018. I
n 2017, these initiatives were also applied to the large-size Camry, Lexus IC, and Lexus IS models...
Did Lexus just admit that the RC will be rebadged as IC, per some rumors? Or was that just a couple of careless typos (given the 2017 date) where they meant to say LC and LS?