Yes, it's looking like T-RackS 6. But it probably won't be a paid upgrade for existing T-RackS gear, since the base Custom Shop (T-RackS CS) is free and unlocks the gear you already own.
But it's pretty disappointing to realise we're probably still at least 6 months away from native Apple Silicon versions of our 50+ T-RackS plugins.
(The previous T-RackS update, v5.8.0, was released in late November 2021, 6 months ago.)