Pratt has cultivated a very specific image based on his charm and charisma since his days as Andy Dwyer on Parks and Recreation, and getting him into one extra commercial could go a long way towards helping generate excitement and enthusiasm for those films.
As much as it probably benefits Michelob to have Chris Pratt step in and act as the spokesperson for the brand during the Super Bowl, it is very much a two-way street.
2018 is going to deliver a big summer for Pratt, as he will feature prominently in Avengers: Infinity War as well as Jurassic World: Fallen Kingdom.