'Klingon' is a really silly name.
The Traveler and Wesley's destiny with him.
Klingons were developed by Gene L Coon from Roddenberry's request to develop a recurring villain for the Federation.
The Traveler was introduced in an episode written by Diane Duane and Michael Reaves. Roddenberry had no input regarding Wesley's destiny with him, Roddenberry always wanted Wesley to go to the Academy and become a Starfleet officer. In fact, the episode Journey's End was written after Roddenberry died, so how the hell can you blame him for that?