“Injunctions are equitable in nature and the general purpose of prejudgment injunctive relief is to preserve the status quo pending a determination on the merits. The grant or denial of a temporary restraining order or preliminary injunction ‘does not amount to an adjudication of the ultimate rights in controversy. It merely determines that the court, balancing the respective equities of the parties, concludes that, pending a trial on the merits,’ exercise of the right claimed by the defendant should or should not be restrained.”
[California Practice Guide: Civil Procedure Before Trial [certain citations omitted]]