These will be at least 10k more than the 370 (when they were new out, not now that the price has fallen), because twin turbo.
There is some danger that they will try to gouge by creeping up under the Supra's price point (ie, make it >$80k) to make it look like good value by comparison, even if they could reasonably sell them in the 70s.
Arguably, they could make more money if they look like a bargain, simply by selling (and servicing) more of them. But.....weird decisions get made.
The Yaris GR is debuting at $40k and will be $50k minimum (for the base model - the hot model will be >$10k more than that!). The Yaris might even be a faster car than the 400Z, but the 400 is still going to want to position itself upmarket from a scungy little hatchback. So, easily >$10k more. That makes it at least 70, possibly 75.