Rowling does have a second screenwriter for FB3 (and an extra year to work on the script, she basically fell off the face of the earth that year working on the script with no social media presence and less appearances), so i’m staying optimistic.
Regardless, i’m curious if the land will be set in post FB2 (Evil queenie, freedom to integrate characters like that become important in FB3 that weren’t in paris in FB2) or stays strict to the film timeline. i Hope it’s option 1, and by the escaped creatures ride story, i think that’s the option that’ll happen.