It will SUCK. Trust me.
Come on. It's patently obvious that the FR TV series is going to suck. Not being a Salvatore fan, I don't see his involvement as a plus, though perhaps not as bad as "some corporate schill" doing a standard Hollywood hackjob on it. However, I'm sure that any good Salvatore attempts to do will be soundly flushed by the Fireworks executives, who want another MUTANT X, not high art.
The fact of the matter is Fireworks is incapable of doing this series justice. It will be just another lame-o Robin Hood, Beastmaster, Hercules, Xena type showcase for musclebound idiots and no-talent bimbos with big cleavage prancing around swinging plastic swords at each other, with lame CGI effects liberally sprinkled in. It will have none of the seriousness or attention to detail of LoTR, and will be more akin to the wretched D&D movie than anything. It will suck, and to presume otherwise is just begging for a colossal let-down.
Speculation on this series ability to entertain or have any kind of longevity is pointless. The answer is: It will suck and it will flop. It will do nothing to bring more people to the game, and will likely hurt the franchise. WoTC merely did this deal for the moo-lah, not because they trusted Fireworks to do a good job with it. That is their corporate perogative, but it certainly leaves a bad taste in my mouth from a creative standpoint.