SAN DIEGO — The four-year legal battle between Stone Brewing and Keystone parent Molson Coors is finally headed to court next week, with hundreds of millions potentially at stake. A jury trial in the trademark infringement case is scheduled to kick off Monday in San Diego federal court. It was originally slated for November 2020 but was delayed multiple times, in part because of intense legal wrangling on both sides. Late last year, a U.S. District Judge in San Diego called it “one of the most contentious cases I’ve ever experienced, and I have had trademark/trade name cases before,” according…