Adam B. Vary Senior Entertainment Writer When Jon Favreau stepped onto the red carpet for the Season 3 premiere of “The Mandalorian” on Feb. 28, the Disney+ show’s creator and executive producer was feeling nostalgic. “It’s been a while since we’ve been all together here like this,” Favreau told Variety, evoking the November 2019 premiere for the launch of the show — and of Disney+ itself. “It was before the first episode aired!” At that time, “The Mandalorian” was a scrappy landspeeder in the vast “Star Wars” galaxy, nipping at the heels of “The Rise of Skywalker,” the culminating feature film from director J.J. Abrams that was expected just a month later to obliterate the box office like a cinematic Death Star. Instead, “The Mandalorian” became a global sensation thanks to the incandescent cuteness of Baby Yoda, blasting Disney+ into light-speed with 26.5 million subscribers in its first six weeks.