Beyonce and Christina work in two totally different ways. Beyonce is known to be a fast worker, and Christina likes to take her time.
It's been a year since she has had a real single. And she already started working on her album last year. She has had enough time and will have enough time to release a hot album by December.
She already has at least 8-10 hits (not singles, actual hits), it's about time for her to have a GH.
Also, I don't think it's a wise move for her to push any new studio album with having a kid this year. But if it floats well with her, my ears are on standby.