Leaked by FanlessTech earlier this year, a new internal roadmap has confirmed that Phantom Canyon and Panther Canyon NUCs, also known as NUC 11 Performance and NUC 11 Extreme respectively, will arrive later this year. However, the outbreak of COVID-19 may have delayed their release. The NUC 9 Extreme appears to be sticking around until at least 2021, too.
https://www.notebookcheck.net/Intel-gives-the-NUC-9-Performance-a-new-lease-of-life-as-the-NUC-11-Performance-and-NUC-11-Extreme-get-delayed.456005.0.html