Anyone can start a lawsuit against anybody else. Nothing precludes your former landlord from suing you again. Whether or not he has a claim of any sort against you can only be answered by an attorney after reviewing all of the documents from the prior cases.
The above constitutes general information only and should not be considered legal advice.
Dear Utica Tenant:
If the former shady landlord starts a fresh lawsuit, you have a chance to make a motion to dismiss if the issues involved in the new claim were already fully determined against the landlord in your lawsuit.
The answer provided to you is in the nature of general information. The general proposition being that you should try to avoid a bad outcome if you can.
What is he filing? A housing petition can have its financial issues severed (a process called "bifurcation") and the landlord can recover sums of rent in small claims/civil court depending on amount. If something else is happening, check with an Ttorney.