Don Lemon threatened to sue Elon Musk this week after Musk abruptly canceled Lemon’s new X show, RadarOnline.com has learned. In the latest development to come after the former CNN star announced that Musk had canceled his X partnership, a spokesperson for Lemon said that “if we have to go to court, we will.” Also surprising are reports that Lemon never signed a contract with Musk or X before Musk canceled Lemon’s partnership with the popular platform on Friday – meaning it is unclear whether the fired CNN star would have grounds to sue the Tesla billionaire over the dispute. At least two peop…