My predictions:
Reiss and Sonia will have a very straightforward IVF cycle and get pregnant on the first attempt. Using the rest of Stunning Debbie's money they will buy everything for the baby, and maybe even fly Bex home for the birth. As her pregnancy progresses, Stunning Debbie will awake from her coma (but with no complications as soap opera comas are just an elongated nap) and she will somehow arrive in Walford, resulting in Reiss and Stunning Debbie taking the baby for themselves, leaving Sonia alone.
Whitney and Zack will miraculously be approved for fostering, even though they would never be approved in a million years. They will fall in love with their first placement and decide to adopt, however during this process Whitney will find out she's pregnant (due to something like antibiotics or sickness affecting her contraception). She will still want to adopt the foster kid but Zack won't, want to now they have a kid with his blood, and they split up, with Whitney leaving with the foster kid and a baby bump.
Ben and Kat trauma bond and have the weirdest affair in Walford (ok, this one's a joke)