Also, in the interview in the Starwars.com link in the OP, since Maul is confirmed to return in the Clone Wars, this reinforces Maul's return is purely a marketing strategy. You've got the film front with Episode I 3D and the TV front with kids being introduced to Maul in the Clone Wars. It's a shame its such a terrible image of Maul. He should at least be in a wheelchair.
Maul is one of the most resurrected characters in SW. He's come back to fight Vader and was killed by him, he's come back to fight Obi-Wan and was killed by Uncle Owen, he's come back as a force ghost to annoy Luke. He keeps coming back because of his perceived "coolness" which translates to sales.
As for the wheelchair comment, he gets cybernetic legs in the comics. Kinda like Grevious.
But I don't acknowledge any of that nonsense, he died in Episode 1 and that's that, the EU and CW are hardly canon. I rarely acknowledge the prequels anyways but that's another story.