I don't consider Forever to be part of the Burton narrative. Schumacher may have made reference to prior events and perhaps there was some intent to make them LOOSELY cohesive, but the overall feeling of the movie and portrayal of the characters do not, in my opinion, reflect what Tim Burton would have done. So I don't see it being a story Tim Burton or Michael Keaton would have agreed to do. Keaton in fact bowed out because of the story.