A Druid battles Fallen minions who are being resurrected by a Fallen Shaman who has the Multishot affix meaning he can resurrect multiple Fallen instead of the usual one.
You can see the three being resurrected at this moment in the orange vertical light.
This was from the panel at BlizzCon 2019.
The Druid fights in the Altar of Bishibosh random event as revealed in the panel at BlizzCon 2019.
Bishibosh first appeared in Diablo 2 where he was a superunique who could resurrect other Fallen Shaman and common Fallen.