You are correct.
Phillip Berg, the filing attorney, is a former gubernatorial and senatorial candidate, former chair of the Democratic Party in Montgomery (PA) County, former member of the Democratic State Committee, and former Deputy Attorney General of Pennsylvania. According to Berg, he filed the suit--just days before the DNC is to hold its nominating convention in Denver--for the health of the Democratic Party
It will get interesting. I really suspect the powerbrokers will step in and scare hell out of the judge. However if the Judge is an independent type he may say, "No, I will hear the case".