Printed headline: Upgrade Cycle   The market for large regional jets (RJ) is poised to see several new products, including Embraer’s new E-Jet E2s as well as the Mitsubishi MRJ, enter service in the next few years. In the meantime, current-generation models have some time to rack up orders—and Bombardier is confident that its CRJ line will benefit as a result. “If you look at the fleet plans of the major airlines, they’ve continued to see, over time, phasing ...