It will premiere in January
It has been announced that a new season of Isekai Quartet is in the work. In addition of the previous series, Rising of the Shield Hero will be added to the mix. A teaser has been put and you can watch it bellow:
Funimation describes the story as follows:
The button appeared out of nowhere. There weren’t any signs NOT to push it…so the solution is obvious, right? Is it a trap or the start of something new and exciting? The crews of Re:Zero, Overlord, KONOSUBA, and The Saga of Tanya the Evil will find out when they go from their world to another and get stuck in…class?! See what adorable chaos they’ll get up to in this collection of shorts!
Via: Anime News Network