Oh, I get it now. The question was whether to get Batman or Zelda. I thought he was asking whether he should get the regular release of WW or the Collectors edition of WW. Man, what happened to my reading comprehension there?
Well, then, to answer the real question, my opinion would be to stick with Batman. Having played through WW a few times, I'm in no rush to get another copy just for HD graphics. Maybe if it is cheap enough someday, I might grab a copy because it is still my favorite Zelda but I rarely buy the same game twice. Batman: AO is one of the top games on my want list so I'm a bit biased but I expect a top notch game from it.