The good news is that there is no way G. Jackson could provide better responses and testimony than the elders/representatives that have already testified. When your position is indefensible it does not matter who presents it.
If he is purely a con-man, his sense of self-preservation should kick in and he would flee the country. However, I can also imagine him being so delusional about his own special position that he thinks he could provide a good defense and "stand for Jehovah". I think his next move will say a lot about what he truly believes.