Everything I have seen mentions that the old expansions can be played with the New Wave Core set. That makes me believe that the only thing they will do is release new theaters and perhaps create quick start scenarios. It is my hope that they revisit ALL the scenarios because the majority seem unbalanced. Perhaps they might re-release them since they own the rights with updated rulebooks and scenarios. We can only hope.
yes Next Wave is compatible with everything currently out. i'm sure we will do something with the Days of the fox although a staight reprint is unlikely since the panther would be removed for a more deserving vehicle