They had better have some pretty solid evidence aside from his testimony. Building a case around the word of a man convicted of perjury, especially one with a public hatred of the defendant, seems like a profoundly stupid thing to do.

I'll be waiting with my popcorn, because one way or another, this is gonna be good.

To be fair, he's only hated the defendant since he went to prison on behalf of the defendant.

A prosecutor can get a grand jury to indict a ham sandwich. I've been on a grand jury, and the indictment rate is >95% in most cases.

This just means there’s a high standard to empaneling a grand jury.

They got Michael Cohen for this, and Trump was mentioned in his proceedings as “individual one”.

The relevant phrase in the Michael Cohen indictment referring to Trump was "unindicted co-conspirator". Individual one is how they referred to him. Trump was supposed to be featured much more prominently in the indictment, but the Barr's DOJ intervened on Trump's behalf to minimize his presence in the proceedings, and they went out of their way not to mention him.