The Los Angeles Times offers this report. Regarding the stay of the trial court order ordering the redistricting measure off the ballot, I don’t read anything on the merits into the granting of the stay. Failure to grant the stay would have been like a final decision on the merits (think the Supreme Court stay in Bush v. Gore). Had the trial court order remained in place, it would have been impossible for the 20-day public inspection period to go forward as planned.
As far as the merits, I am going to predict that the appellate court (which may turn out not to be the 3rd appellate district—they have recused in the past when their former colleague, Daniel Kolkey was involved in litigation) is going to affirm the trial court, and the California Supreme Court is going to deny review. I say this with about 80% confidence.