Hey again! :)
First off, great movie, you seem to have improved since the last one. The voices were still pretty bad, but atleast better. The graphics seem to have been improved, and the overall animation has improved by leaps and bounds.
Secondly, last time you asked me where I got the information that Sargeras was a Titan, and not a Pit Lord. Quite simply, read the story on worldofwarcraft [dot] com ;).
Basically, he was a Titan, member of a race of (as far as we know it) the strongest beings troughout the universe. These Titans formed order out of chaos, and created life on the many planets they came across. Now, Sargeras was the greatest of the Titans, and he had the mission to destroy the demon that came from the Twisting Nether. These existed of such beings as the Eredar (the race Archimonde and Kel'Thuzad are part of), the Nathrezim (Dreadlords), and other such beings.
However, their pursistent struggle against him and his exposure to them made him doubt the Titans' intentions, and he slowly turned to evil, thinking that nothing good could come from an orderly universe. Thus, he deceided to undo the workings of his brethren, and summoned the Demons that he had vanguished back into the universe to serve as his army, the Burning Legion.