Maybe Trump expects to lose. Maybe his goal is the discovery part of a trial in the public forum.
Possibly, but the problem Trump and true conservatives have had is a legacy news that hates Trump, conservatives and Christians. Just like Bannon and others cannot get a fair trial in DC, Trump will not get fair coverage from legacy media.
On the other hand, there are conservative outlets from which Trump can call-out the biased justice system and biased media. Continuing to use favorable media and platforms to expose fake news and the left in general has been and will continue to be his MOA.