I agree with that article cozie. Comey is nothing if not discreet and he does not strike me as the type to blow the lid off something sensitive intel-wise in public as revenge for being fired. He may have some damaging information, but he's not going to share it with us.
Comey will refute Trump's assertions that he told him he wasn't under investigation and possibly correct a few other, erm, 'misstatements' by Trump. Trump will tweet throughout attacking Comey's credibility and/or memory with a possible 'liar liar pants on fire' or 'sour grapes because I fired him' tweet in there somewhere. Fox & Co and the Trumpettes will blart about 'Trump says he's a liar, therefore he's a liar' or words to that effect. Trump will twist statements on MSM news reports shouting 'Fake News' and 'Lame Media'. We'll all digest what Comey said and hope beyond hope that it adds some big bricks to the Great Wall of Impeachability.
In other words, business as usual in Trump's America.