The scripts for the Iron Man
films are slapdash messes, and depend largely on Downey's remarkable talent and charisma for any shred of humanity - subtract him and there's not much to draw people in. There's a lot more going on in terms of recognizable human relationships and interaction in Green Lantern
than in most superhero films. Thor
is completely vapid in that regard, though Captain America
Though I suppose a large percentage of the audience for these things is more interested in debating how far someone can throw a magic hammer than in why anyone would care.