Blake Lively and Justin Baldoni avoided a courtroom battle that could have cost each side “multiple millions” of dollars. “This [would have been] a tremendously expensive trial,” New York litigation attorney  Richard C. Schoenstein exclusively told Page Six Monday, shortly after the “It Ends With Us” co-stars settled their contentious legal dispute stemming from the 2024 film. “To have a monthlong jury trial with legal teams of that size would have cost each side probably multiple millions of dollars. If you just look at the docket in this case, the number of individual lawyers that are listed and the number of filings, there have been thousands of filings in this case.” As for how much it possibly could have cost to settle Lively and Baldoni’s high-profile case, Schoenstein explained, “It’s really impossible to tell because it could be a multimillion dollar settlement, but it could also be a walk away that everybody is just going to go home.” Justin Baldoni and Blake Lively (pictured…