Potential Nightwing DC Finest

As far as I'm aware there's no Nightwing DC Finest that's been solicited, so what I'm wondering is, what would the potential content be in a first volume? I'm trying to decide whether to buy the compendiums or wait for a Finest. I know that he's got some Action Comics stuff, and I would definitely want those for the Nightwing & Speedy stories, but how much content prior to his solo run is there/how much double dipping with the compendiums will there be if I buy those?