I don't really want long SJ series coming. I mean, I love One Piece, but it's VERY long. If it aired that's occupying a huge chunk of the block for a very long time, which I don't think they'll want to do. Also, it's my impression that Ani-Monday is generally shooting for an older demographic. If Ani-Monday were 3 or 4 hours long it'd be a different story, but it's not. I'll be happier seeing diversity brought to the block.
Kenshin talk raises a good thought, though. If they can air Ninja Scroll, they could air Sumurai X: Trust & Betrayal without any problems. They should snap those up from ADV post haste, as those OVA's are still pretty much the best Samurai anime that you'll ever find.