Second thought: Can you have DLC for a game that was by it's very nature nothing but DLC?
Is that actually a question? DLC for DLC would be....DLC squared....of course
. What they should do is release this, it needing the main full game installed first, in hard copy only.
Sun Tzu's Art of War was a bit of a hard read so I switched to Sun Tzu Jnr's Colouring Book of Tantrums.