Crunchyroll, alongside TONIKAWA: Over The Moon For You, announced that it will stream:
How NOT to Summon a Demon Lord (Season 2) in 2021
The Hidden Dungeon Only I Can Enter
That Time I Got Reincarnated as a Slime OAD 4 and 5 in July 8 and November respectively
Monster Girl Doctor in Summer 2020
Based on the light novel written by Yukiya Murasaki and illustrated by Takahiro Tsurusaki, How NOT to Summon a Demon Lord sequel is scheduled for 2021. Tezuka Productions and Okuru to Noboru are in charge of the animation production.
Crunchyroll briefly describes the show as:
A young man is summoned to another world and becomes a (pretend) demon lord who blazes his own trail through overwhelming power.
Based on the fantasy light novel written by Meguru Seto and illustrated by Note Takehana, The Hidden Dungeon Only I Can Enter will also stream on Crunchyroll soon. Okuru to Noboru is in charge of the animation production.
Seven Seas Entertainment describes the light novel as:
Hidden dungeons—legendary places that no one knows how to enter—are full of extremely rare items, incredibly dangerous beasts, and strange beings that can grant power beyond measure. Noir, the third son of a penniless baronet, just lost his job. He was contemplating becoming an adventurer when fortune struck only a mile from home, and he opened the entrance to just such a dungeon!
Source: press release