I don't see how they can resolve this anytime soon.
NHL wants an immediate, significant cut to player salaries.
NHLPA does not, at best they can give up or limit future raises but current salaries cannot be reduced.
They seem to be on the same page with regards to revenue sharing and other issues are probably minor stumbling blocks (like UFA, arbitration etc.)
I don't know, right now it sounds like they're entrenched and waiting for the either side to cave in. I think either side thinks the other will not let the entire season be cancelled over this so they'll get what they want around December.