It is very obvious that the Mordo is going to be a very integral part of the next Marvel movies, specifically with the "Doctor Strange" movie franchise. Even though the character is just a moustache-wielding villain in the original comics, the movie managed to bring him a positive reputation. This is thanks to the level of depth that the movie had.

This is considered to be one of the most vital pieces in the movie's plotline. This is also the very reason why Scott Derrickson, the director of the movie, emphasized the post-credits scene. According to Cinema Blend, the post-credit scene of "Doctor Strange" was carefully planned and thought of, as this carries the future of the movie franchise.

After an interview with Derrickson, the director says that the post-credits scene wasn't thought of until the post-production was already taking place. For him, getting to highlight Mordo's involvement in the scene for one extra time would be crucial in giving depth in the film, as well as ensuring that future movie sequels will be in coherence with the original movie.

According to Movie Web, Mordo was a very obedient follower of The Ancient One. Because of this, he considers himself a vessel. This shows that he can take his own life for the greater good. What this means is that Mordo is doing the best of what he can to remove all the sorcerers in the world, which for him, is the greater good.

With all of these being said, "Doctor Strange" would surely be one of the most memorable superhero films made by Marvel. Let's just hope that future sequels to the movie will retain its identity and glory.