that I know of Point Guardian, Doc Hypion(sP),Cold Servings, A.N.t, and green Avenger comes to mind. The former dropdown had a slew of them.
And yes your dropdown probably won't be gigantic, at least at first. to me its about having the ability, to manage them and also so you can find out other comics like yours, and other creators doing simular things.
I'm trying to get stuff together to set up common Dropdowns... So there will be a new one. If you want to set it up, it'd be awesome. but if not its cool.
on a side note, my comics next storyline has the characters playing as super heroes for a bit... ha ha. My comic isn't a super hero comic... but its been fun drawing them as such.
<KittyKatBlack> You look deranged. But I mean that in the nicest way possible. ^_^;