You don't think perhaps they are planning a network but they are in super ultra stealth mode and being completely silent about it? Because look at the situation if you are correct, and they are not planning to build their own network AND like you theorize, they are not planning to use Tesla's network. The very obvious question becomes - how will they sell EV's in the Model S price range without a charging network that is equivalent to the Superchargers in convenience? Are you suggesting they are either stupid enough to think that a rapid charge network doesn't have a significant impact on sales or they actually do not care whether their very expensive high end EV's will sell in large numbers?
I know I, for one, will not dump $80K on an electric Audi if I have to resort to a patchwork of of semi-rapid chargers using the Plugshare app to find them as I try to drive long distances.
Without the Supercharger network I would not have purchased a Tesla. Maybe that isn't important to most people, but it certainly is to me.