It seems to me that it would make much more sense that they are looking forward to the case because they think they have a strong case that they DIDN'T do any of that stuff. It seems strange that they would look forward to a case where they were actually culpable.
Kent Walker isn't your typical corporate lawyer. Kent Walker really does look forward to crushing his opponent in court. After Kent crushes this fool, he will probably host a company-wide Q&A where he will gloat over the bodies of his vanquished enemies.
Is not the typical PR answer when you got sued, you spect something like:
"Here at Google we are against any kind of discrimination and we deny the alleged acusations, those do not represent our values"
That is a typical PR answer, but instead they are practicality saying "yes we do all that terrible stuff, so bring it on".