As they have only just filled, it will likely take at least a year, likely two before it hits the courts due to the time it takes the courts to get to a case, plus discovery.
Then you have initial options, each side will want summary judgement, the judge will need weeks, likely months to determine the merits of those.
A summary judgement essentially means the judge decides if there is sufficient evidence to not require the full trial to determine guilt or insufficient evidence to warrant any trial going ahead.
The physical trial, where the jury sits and listens to the evidence (this rarely means facts) is relatively short. The time is all the things before, after, readying for appeals, rinse and repeat.
Also, this particular jurisdiction has turned the process into a wealth gaining business for the local residents and local lawyers, they are notorious for it.
Profiteering, real profiteering takes time to build up those billable hours for the lawyers and the expenses for the jurists.