As we approach the 6 month mark of the Network, WWE has to be planning to release something substantial enough to keep subscriptions from dropping at the first available opportunity. What do you think the plan will be? Perhaps they release year one of Nitro, or maybe they shock everyone and pick up classic RoH as a 'before they were famous' showcase of the likes of Daniel Bryan. One way or another they need a hook to keep people subscribing after the 6 month contract is over.
Really, they HAVE to start adding Nitro soon. It's too big of a part of their library not to. And really that would probably be enough of a content hook to get more people for a while.