I just found out. The Return of the Thief has an actual publication date. Whatever else happens in 2020, we have this to look forward to! If you haven't yet discovered Eugenides, this is the year to start. (I'm so excited for those of you who haven't read the Queen's Thief series yet. I recommend starting at the beginning (with The Thief, which I consider a middle-grade book, unlike the rest of the series) so you don't get spoiled for anything. The plots are so brilliant, and the characters ... Well, lets just say there's a reason why fans are so passionate about this series.)
Network Effect comes out May 5. You don't need me to tell you to read the Murderbot novellas, do you? Seriously. Go read the Murderbot novellas.
A couple more sequels to squee about:
The Iron Will of Genie Lo, sequel to The Epic Crush of Genie Lo, which was supremely funny and a great adventure and will introduce you to the Monkey King if you didn't already know about him. (You should know about the Monkey King. He and Eugenides would ... well, actually they would probably hate each other. Anyway, you'll love him.)
Deathless Divide, sequel to Dread Nation. More zombies! Also friendship and girl power and frontier America and general awesomeness.
Another Invisible Library book: The Secret Chapter. Wait, this one's already out! Yay! More Irene and Kai capering through every possible genre while saving the multiverse from fae and dragons.
New Zen Cho! Not a sequel, but a fantastic-sounding new story: The Order of the Pure Moon Reflected in Water. Gorgeous cover!
Also new Sarah Beth Durst: Race the Sands. Looks very cool. People reborn as monsters, people who ride the monsters in a race with souls on the line.