In favour of Hero, it is of the same kind as 'Crouching Tiger Hidden Dragon', but it's supposed to be better. Now, that's a pretty fine endorsement.
In favour of Sky Captain, it apparently includes a naked three-in-a-bed romp, with Jude Law and another guy, and a girl. You don't get those on at your local cinema too often. However on the negative side I think the girl is Gwyneth Paltrow and the guy is Omid Djalili.
I mean, Omid looks like a fun guy, but what's he doing in my three-in-a-bed fantasy world?