I'm not even part of the team but I had an idea a couple months ago that i've been writing much about and love some feedback from you fellow tolkien geeks...
Divide and Conquer; 4th Age The Finished Tales.
Now i've written a whole load of potential storylines, but the one i settled on...
"...and Sauron, forseeing his own death, had the Witch-King of Angmar kidnap Legolas' mother near the beginning of the Third Age. Sauron then spawned two immortal offspring through her and they became Sauron's servants and his living legacy after his fall at the end of the Third Age. Sauron sent his children far into the East to decieve and corrupt the two blue wizards. They then spawned an empire of evil elite elves in the far east (similar to dark elves in forgotten realms lore) comprised of wizards, warriors and evil clerics that worship melkor...."
i've written more but i'm sure you guys could find and either poke fun at or find tweaks to be more lore accurate. looking forward to 1.0!