Neil Patrick Harris will be helping to poke fun at Nicolas Cage’s career after signing on to play his talent agent in upcoming action-comedy The Unbearable Weight of Massive Talent.The Ghost Rider star is set to portray a fictionalized version of himself as a debt-ridden Cage, desperate to land a part in Quentin Tarantino’s next movie, only to find himself taking on a vastly different role as a real-life informant for the C.I.A.