Article continues below advertisementBlake Lively and Justin Baldoni's legal battle is heading toward a dramatic courtroom clash, and the witness list reads more like a Hollywood call sheet than a standard legal filing.With more than 40 potential witnesses named ahead of the May 18 trial, the dispute between the It Ends With Us costars has officially entered its most high-stakes phase yet, drawing in A-list names, publicists and behind-the-scenes power players.