Context: A sequel to Spectre will begin development in spring 2016. Sam Mendes has stated he will not return to direct the next 007 film. Christoph Waltz has signed on for two more films in the series, but his return depends on whether or not Craig will again portray Bond.

Question: Christoph Waltz's appearance in future Bond movies is contingent on the appearance of which other actor?
Answer: Craig

Question: When will work being on the follow-up to Spectre?
Answer: spring 2016

Question: When will the sequel to Spectre being development?
Answer: spring 2016.

Question: A prequel to Spectre will begin when?
Answer: Unanswerable

Question: Who will return to direct the next 007 film?
Answer: Unanswerable

Question: Who has signed on for three more films in the series?
Answer: Unanswerable

Question: Whose return depends on whether or not Sam Mendes returns to portray Bond?
Answer: Unanswerable