Scott Huver “Reboot” creator Steven Levitan admits that having a cast stacked with Hollywood veterans, including Keegan-Michael Key, Judy Greer, Johnny Knoxville, Rachel Bloom and Paul Reiser, was almost like having a second writers’ room when it came to war stories for the show’s inside-Hollywood view of rebooting a beloved, 20-year-old sitcom. “We would just be sitting around talking and then someone would say this, ‘Oh, this reminds me of the time this has happened,’ and then [the writers] refined it in next week’s script,” laughed the “Modern Family” co-creator at the premiere of his new Hulu series, held on the Fox lot that also serves as the backdrop for the show.