From an interview with the Trek writer's:
"The common denominator in [successful sequels] involved a major test for the hero and a bad guy who was truly frightening and who put the hero through the mill."
The best TOS Trek did not have a bad guy: The Corbomite Maneuver, Balance of Terror, City on the Edge, Shore Leave.... The list goes on and on.
Does the Trek sequel really need a bad guy?
"The common denominator in [successful sequels] involved a major test for the hero and a bad guy who was truly frightening and who put the hero through the mill."
The best TOS Trek did not have a bad guy: The Corbomite Maneuver, Balance of Terror, City on the Edge, Shore Leave.... The list goes on and on.
Does the Trek sequel really need a bad guy?