Following the decision by the organization formerly known as the NFLPA to decertify, the NFL implemented a lockout. The players response so that was to request an injunction to block the lockout. The hearing for that case, according to reports, will come on April 6.
The judge, as of now, will be Susan Nelson. Some thought it would land in Judge David Doty's court because he presided over the last CBA but that apparently isn't the case. Doty was a lightning rod in the CBA negotiations because his rulings have over the year tended to be pro-player.
Just because this hearing is coming doesn't mean the two sides can't stil negotiate. They can, if they want, continue to work out a new CBA. It's unclear if they plan to do so.
April 6th comes before the NFL draft so I'm sure most would prefer to hear a determination on this shortly after that so things like free agency can begin if the lockout is indeed blocked and the 2010 rules are put into place.