I for one would like to see a lot more indie and foreign stuff here. Especially stuff from the b/w anthologies Fantagraphics and others used to put out. And there's SO much PD strip material too.
And more Pat Mills. Especially from CRISIS. In fact, lots and lots of CRISIS and REVOLVER. That's what I'd like to see.
All due respect to the Marvel and DC folks. It's just that there's plenty of room for the rest of this great medium we call comics. This at its best isn't some bootleg site. It should be a place to become familiar with that you might not otherwise. (as, perversely in my case, it was for me when it came to mainstream, not my first choice at the comics store even back to my teens)