How is this possible ?
Company signs agreement with employee to let him go and start another company in the same business, then sues.
If they did sign that agreement, why did they sue ? And if they did not, why is a lawyer saying they did ?
Is this another case of "well, we did agree to that, but this is different" ? - aka : another bloody waste of time in court ?
Honestly, if I were the judge I would throw the whole thing out on principle. You waived your right to complain, so what are you doing here ?