Something that occured to me reading the last book...
I think Moradin may betray the Dark One:
1. Way back in the beginning, in the prologue to Eye of the World, Ishamael offered Lews Therin a chance to join him, and together they would destroy the Dark One forever.
2. Ishamael has been spun out of the Bore hundreds or thousands of times, witnesssing the cycles each time. He tells Rand that the cycles has been repreating itself over and over again for thousands of years, and he is sick of it. I can't remember his name off the top of my head, but Rand had a sage/advisor that believed the same thing, and he believed that this time something was different, Rand could break the cycle. Unfortunatly, he was killed before Rand could talk to him about it.
3. Moradin saved Rand's life when fighting Sammael. Why would he do that?
Just some random thoughts. Moradin uses the True Power exclusivly now, which is supposed to bind you the the Dark One even farther, but a lot of things just aren't adding up with him.