This is a very interesting question, but it's important to clarify that Michael Keaton does not go by the name "Michael Keaton Douglas".
Michael Keaton is a well-established actor, known for roles in iconic films like "Beetlejuice" and "Batman". He has never legally changed his name to include Douglas.
Perhaps you're thinking of another actor, or there might be a misunderstanding. Could you provide more context or details?
If you're interested in Michael Keaton's career, I can share some information about his recent projects and his impact on Hollywood.