A new 7-star raid has been announced: the featured Pokémon this time is Hisuian Samurott with the Water Tera Type and Mightiest Mark. This event will run from 24 Nov, 00:00 UTC through 26 Nov, 23:59 UTC, and again from 1 Dec, 00:00 UTC through 3 Dec, 23:59 UTC.
Edit: Got around to battling the 7-star Eevee for the first time, and it was a lot easier than I thought it'd be!