One of the most epic sourcebooks for Middle-Earth Roleplaying was the one detailing Moria. Lots of maps, ingenious Dwarven traps, and details on all the dark hordes that are camping down in the depths of the mines.
I bought the Adventurer’s Companion for The One Ring (easily my favourite RPG line right now), and that details a few groups of heroes who band together for a common purpose. In the section detailing the “Cragsmen of Balin’s Colony”, it says (page 133 of the PDF):
The Dwarves will not permit the company to engage in the taking of Moria (indeed, that is a tale for another supplement…)
That fills me with a lot of excitement. I was worried that, with the success of the D&D version of the sourcebooks (the “Adventures in Middle-Earth” line), the focus would shift away from The One Ring, but I’m really glad that doesn’t seem to be the case. And the time period of The One Ring is between The Hobbit and The Lord of the Rings, which means there’s plenty of Orcs and even a Balrog to tangle with…