Link to the original source. Google translation says they have the "planned launch time" if you buy the latest issue.
https://mag-x.jp/2020/07/28/14584/
I have a similar question. Let's say 2025 is here and BMW is planning to pull the plug, but sales of the Supra are still decent and Toyota may want to keep it around for another year or two until the A100 is ready. I wonder if Toyota is allowed to continue producing the Supra without the Z4?
Right, but you're probably going to get more than just an extra 100hp. Bigger brakes and tires, suspension upgrades, nicer interior pieces here and there ect.