What, Leslie Knope didn't have enough on her plate with becoming a member of Pawnee's City Council, and losing her boyfriend to a position in Washington D.C., now she's gone and got herself another enemy?  It's a rocky road ahead for 'Parks and Recreation' season 5, as whole new challenges await both the eternally optimistic Leslie, and the department itself, but who specifically will stand in their way?  And why doesn't his face seem familiar?

It's not often that we say of someone that we'd recognize them better with a ski-mask on, but that's exactly how we'll feel when 'Parks and Recreation' debuts its fifth season on Thursday, September 20.  TVLine reports that former 'Late Night with Conan O'Brien' and Adult Swim's 'Delocated' lead Jon Glaser (seen here, face and all) will go head to head with Leslie Knope in the coming season, beginning with the third episode.

Says 'Parks' show-runner Mike Schur of Glaser's orthodontist character, "[He] basically becomes Leslie’s nemesis. He doesn’t find her interesting or charming at all, and doesn’t care about her bright-eyed, bushy-tailed attitude toward making the town better… He just doesn’t like her.”

Glaser's character, along with a new "extremely old" Strom Thurman-like politician will both appear in the third episode of the season, and recur throughout the year.  Glaser, perhaps most recognizable as the hooded, voice-altered figure of Adult Swim's 'Delocated,' joins an impressive year that includes Lucy Lawless as a new love interest for Ron Swanson, as well as guest turns from U.S. Senators Barbara Boxer (California), Olympia Snowe (Maine) and even Arizona senator / former presidential candidate John McCain.

What say you?  Do you think Leslie Knope will crack under the weight of her new responsibilities, particularly with Jon Glaser as her new nemesis?  Will she and Ben make it work?  Tell us what you're hoping to see in 'Parks and Recreation' season 5 in the comments below!