Verizon Wireless and Motorola are getting exclusive with their relationship. Starting with the Droid Ultra lineup, Motorola will be the only smartphone manufacturer to build Droid smartphones, Verizon marketing executive Jeff Dietel told CNET on Tuesday. Verizon and Motorola unveiled the Droid Ultra family of products, including the Droid Ultra itself, the Droid Ultra Maxx, and the Droid Ultra Mini. The partnership locks up a prime flagship slot for Motorola, which is badly in need of hit smartphones to turn itself around. While many vendors are opting to release their phones on multiple carriers, exclusives are seen as valuable because they guarantee a certain amount of marketing heft by the carrier. “There are millions of users that are happy with it and loyal to the Droid brand,” said Rick Osterloh, head of product management for Motorola.