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In Season 3 of Star Wars: the Clone Wars, Savage Opress, a zabrack trained in the dark side, was introduced as the brother of Maul. The Nightsister Mother Talzin, sent him on a journey to find his brother, who was supposedly dead.
Of course, this raises many questions about Maul; where has he been hiding all these years? Who else knows he's alive? Where does Savage fit into things? How did Talzin know he was alive? Will there be a fight between Maul and Obi-Wan Kenobi, who was responsible for his near death? And how did he survive the fall down that shaft?
“There’s a lot of ground that has not been covered as far as Darth Maul is concerned, so there’s a lot of room to grow with him,” Filoni says. “It’s all balanced with, ‘Boy, we’ve gotta make this really good because this is a really big deal.’”
Darth Maul will make his appearance in spring 2012, leaving plenty of time for us to speculate on this piece of news.