While I DON'T think it ultimately happens, there is word that the owners may choose to lock the players out if a new CBA isn't reached. At a minimum it could have an effect on FA signings and the winter meetings.
But, let's say the worst happens and it stretches into ST or even a week or two into the regular season.
What happens with the opening of the new park? What happens to the timetable of the rebuild?
I suspect that there are some tight A holes in Atlanta right now...