original_query: Who does Serpentor bring in to lead the G.I. Joe team?
query: Who does Serpentor bring in to lead the G.I. Joe team?
answer: Serpentor does not bring anyone in to lead the G.I. Joe team.  In the Sunbow cartoon, General Hawk is already in place to lead the team when the season begins. There is no on-screen explanation for this.