Trademark Dispute: employer claiming my side project IP

Quick background on my situation — any input appreciated.

employer claiming my side project IP. I've been dealing with this for about 9 months now and the situation isn't improving.

This involves content I created over the past 28 months. I do have documentation proving my ownership and timeline.

What's the typical outcome in situations like this?

Following this thread — Bookmarking this. Dealing with almost the exact same thing.

Not a lawyer, but I have direct experience with this.

In my case, it took about 4-8 months to resolve. The key was filing with the appropriate government agency.