It's listed on the schedule in Marvel's July 2019 solicitations. But there is no actual solicitation, just a note that it's on sale on the 10th of July. However there is an image…
It is called FEARLESS #1. That is all we currently know.
A new ongoing series for Captain Marvel? The return of the Fearless Defenders? A future for Annabelle Riggs post-War Of The Realms #2? The history of Carol Danvers? A celebration of the women of Marvel Comics, in the fashion of this book?
We don't know. We emailed Marvel and, as of yet, they haven't replied.
What do you think it is?
UPDATE: Here it is:
FEARLESS #1 (OF 3)
SEANAN MCGUIRE, LEAH WILLIAMS & MORE (W) • CLAIRE ROE & MORE (A) COVER BY YASMINE PUTRI
CONNECTING VARIANT COVER BY JENNY FRISON
VARIANT COVER BY TBA
THE FIERCEST LADIES OF THE MARVEL UNIVERSE – ON AND OFF THE PAGE!
Straight off her silver-screen debut, Captain Marvel takes the world by storm! And speaking of the weather, Storm of the X-Men faces a problem only a goddess could solve. Add the Invisible Woman, and you've got an unstoppable trio in a story by Hugo-nominated novelist and SPIDER-GWEN: GHOST-SPIDER writer Seanan McGuire! Then, Leah Williams takes us back to the golden days of romance with Millie the Model! Plus: Get your dose of herstory with profiles on classic and contemporary creators!