Found this and I also read in today's newspaper that they will be at the "sister festival" Southside (near Tuttlingen). Not sure yet which day will be which one.
https://www.hurricane.de/
(https://www.hurricane.de/ccds_cache_img/b5/b58dca9f433c7b75827e1af36ec82345.620x3800x0.jpg)
News article:
https://www.musikexpress.de/gleich-4-headliner-hurricane-festival-bestaetigt-erste-bands-fuer-2019-1138399/
QuoteDas Hurricane Festival 2019 findet vom 21. bis 23. Juni auf dem Scheeßeler Eichenring statt, das Southside zur gleichen Zeit in Neuhausen ob Eck. Mit vier Headlinern und u.a. den folgenden weiteren Bands.
Foo Fighters, Mumford & Sons, Die Toten Hosen und The Cure.
Any idea how big these festivals are? 20K, 50K people, or more?
In a news article they talk about a number of 60k at the last one they did. (Apparently in 2017 it was even more people!)
https://www.ndr.de/kultur/musik/Weniger-Besucher-bei-grossen-Musikfestivals,musikfestivals106.html
The sister festivals together might add up to about 140k, it is said in various internet sources.
https://rp-online.de/kultur/musik/hurricane-und-southside-2017-rund-140000-menschen-feiern-auf-musikfestivals_aid-21099319
The Cure will play on 23rd June.
The Cure plays this show in these moments. Live streaming
https://www.arte.tv/de/videos/090482-006-A/hurricane-festival-live-vom-23-06-19/
(seems only for people in Germany)