Monsters of Feyland 2: The Well of Dreams is a Kickstarter project by Cawood Publishing for DnD 5e.
The supplement will contain an adventure about a conflict between the fey Courts, as well as a whole lot of new monsters and creatures. Cawood Publishing have a very strong record with their releases and their “Monsters of…” series, such as Monsters of the Underworld, Monsters of the City, and of course the original Monsters of the Feywild all being very successful projects. It looks to me that the trend will continue, as this looks to be another quality project, and it is already at 75% funded with, at the time of writing this, 15 days to go.

Feyland just got a lot stranger! The Well of Dreams has been corrupted and war between the Seelie and Unseelie Courts has begun.
The fifth book in our 5E Monsters series is Monsters of Feyland 2: The Well of Dreams. It will be 140-160 pages with at least 100 new monsters in seven regions! The creatures will include fey, monstrosities, aberrations, undead, dragons, giants, elementals, and beasts. Each monster will have a full-color illustration, stat block, and bio. We’ll also have new magical items, fey flora, adventure hooks, GM advice, encounter tables, region information pages, events tables, and more.
You can visit the Kickstarter page to see more about the project, including backing tiers, stretch goals, shipping info, and get a glimpse of some of the book’s content.