The screams are deafening. By the volume alone, you'd think a major Marvel star just appeared in front of the thousands of fans gathered in the Dolby Theatre. And to be fair, one did: Chris Pratt has just taken his seat onstage. But the fans are here for something a little more small town – literally – than a Guardians of the Galaxy or Avengers premiere. It's the 10-year anniversary of the Parks and Recreation series premiere, and Pratt along with series stars Amy Poehler, Nick Offerman, Rashida Jones, Adam Scott, Rob Lowe, Retta, Aubrey Plaza, Jim O'Heir, …