From edrants.com — dr. mabuse’s house of fun.

2. Do you think that “The Dark Knight Strikes Again” is a valuable contribution to the Batman canon or a marketing gimmick? Or both? If so, why?

Considering who’s working on it, it could certainly be interesting (I hesitate to say ‘valuable’.)

Marketing gimmick? Nothing printed for DC or Marvel (or image, for that matter) is anything less than a marketing gimmick. Hype is the nature of the comics industry.