This doesn't seem like jumping the shark. All it's doing is introducing more DC lore into Smallville. Seems pretty keen to me.
Are they actually part of DC lore, though? I just always assumed they were just created for the cartoon.
Also you guys watch the show? I don't mean this to be insulting, and I've never seen it, but I'd just always got the impression that it was kinda made for teenage girls, like a teen soap-opera.