Update on Metroid Prime 4: Development restart. Retro Studios + Tanabe now working on it

[JRPGfan]

jason1637 said:

Oof. That's terrible news. 2021 or 2020 now.

If your dumping everything and starting back up from scratch... 3 years might not be enough time (2021).
I suspect you wont see Metroid 4, until 2022.