OK, so props to DemonoftheNorth for sharing this, but Sundew's cover got revealed!
Take a look!

Thank the moons for Joy Ang and Phil Falco who continue to provide us nerds with fantastical cover art!

Sundew is probably my favorite in arc 3, and her cover is the best so far!

...sucks the book isnt coming out soon, but its still awesome!

OK, I'll shut up now.
;)