User blog comment:Admiral Atom/Star Wars Rebels Teaser Trailer and Info/@comment-4935956-20131014192927

Imperial Inquisitors are going to be in Rebels? Awesome!

The Inquisitor in the one video kind of looks like the Mortis Son if you think about it.

I hope it's Malorum or somebody but it doesn't look like it. Wookieepedia currently names him as Unidentified Inquisitor, and his species is marked as Pau'an. Also, it says he was serving Vader around 5 BBY. Malorum died in 18 BBY, so because of the Inquisitor being Pau'an and serving Vader around 5 BBY, it can't be Malorum.

http://starwars.wikia.com/wiki/Unidentified_Inquisitor