I do want them to bring Kabuto over here to the states, however...
I fear the legal and licensing issues might get in the way of that. If it were being considered, it might end up being easier to make a new English dub, either through Cartoon Network co-producing it like the second season of Big O, or through a company like Funimation. And at that point, it just seems easier to stick to anime and action cartoons.
I would like to see a new English dub of Sailor Moon, something that will equal an uncut and complete release in the states, including Stars.
I think Gurren Lagann would do well on Toonami. Sure, it's an older series, but things like Voltron and Thundercats weren't exactly new when Toonami aired them. A balance of older and newer shows, from Japan or from the west, could still work in their favor. Just because it's old doesn't mean everyone has seen it or knows about it.
There are a bunch of anime titles I think would work on Toonami. Heck, if they can hype up Hamtaro, they can make just about anything seem cool.
It's not about assigning a specific audience, it's about advertising it enough and making sure there is plenty of hype. It's also about the unique presentation that only Toonami could give us. Toonami in and of itself was a joy to watch, not just for the anime it could introduce us to, but all the original content and nuggets of joy to experience between shows.