Doctor Strange will explore the magic
Doctros Strange's magic won't be explained in the scientific way, says the director of the movie.

During the interview with GamersRadar, Scott Derrickson have stated:
“Magic is magic in this movie. It’s not something that’s explained away scientifically. It’s not something that’s easy to define. As magic should be. Magic should be mysterious. There’s mystery to magic and there’s mystery to the tone of the movie. Mystery is a good thing.”
This is the first time, when Marvel Studio have decidted to go with an explaination,
because of their previous movies, every unusial and supernatural thing were basied on science. For example, the 'magic' in Asgard ("Thor" and "Thor:The Dark World), wasn't magic at all, it was the highly developed techlogys, and Wanda's (played by Elizabeth Olsens) powers was discribed as "neuro-electric interfacing, telekinesis, mental manipulation" by Maria Hill in the second instullment of the "Avengers". Ironicly, in the comics, her powers includes magic.

Concidering that one of the episode of Marvel's Agents of SHIELD will be tie in to the 'Doctor Strange' movie, it will make sense, since this show will introduce the iconic character from the hell - the Ghost Rider.
The second trailer was introduced at the Comic Con in San Diego, and it's already has more than 14 million views on Youtube.
