A district court granted a temporary injunction against the unions.
Judge Alsup said he would hold a hearing in a week on whether to grant a full 80-day injunction.
A court may grant an injunction on an interim basis pending a full hearing of the case.
A judge refused to grant an injunction against publication but agreed to hear the case on Monday.
He granted a permanent injunction against the home on Nov. 30.
Earlier this month, a state appeals court panel granted the union a temporary injunction to stop the city from going ahead with its plan.
The judge in the case granted a permanent injunction ordering him to stay away from the plaintiffs.
To grant a preliminary injunction, the court must find that the Government is "likely to succeed on the merits."
The judge soon granted a preliminary injunction, and the state amended the law in order to avoid several of the original problems.
A regional court in Düsseldorf is expected to grant an injunction against the purchase.