I think Trump is going to fire his lawyers and represent himself. So not only will he take the stand - he will also cross examine himself at the same time. I think we are going to see some crazy angry stuff out of Trump and hopefully he will get hit with contempt of court and fined a few times. Cheers!
I actually think there's a chance he might and try and work it into another chance to delay a verdict or at least make the proceedings into more of a mockery/spectacle for appeal purposes.
The only thing I'm sure of, though, is we won't know until after the prosecution puts on its entire case.