What rule changes did you make? Does it improve the game? I haven't read the rules yet, but if your variant is more fun then I may try it the first time I play.
There are two versions: the one with the one ring and the normal versions with any lotr rules.
I try to keep it as simple as possible. If you play with the one ring, it is leaving the shire (with fellowship) and approaches
Mount Doom every turn. If it reaches the last region on the map, the game is over and the preson with most points wins the game. (You get points for mighty events you played during game etc...)
Although there are cards, like the Balrog, that stop the fellowship, it is really soon over (about 30 - 75 minutes).
The first game is a bit complicated, I think. Maybe you play the first one after the original rules!
My changes:
Do not use the one ring! Otherwise the game is too fast over.
Remove cards, that stop the fellowship. They are now useless.
The person, who is the only one remaining wins the game
--Disadventage: Now it is lasting very long (3-6 hours!)
Now, the interesting things! You can create your own cards, for those you removed!
Swanship of the Galadhrim Play at the start of your skirmish phase. You may cross a river.
The eagles are coming Play at the start of the moving phase.
You may move up to three of your units to another region.
The mirror of Galadriel Play at the start of your turns.
You may look at the top three cards of the event deck. Take one into hand.
Saruman's Power Play at the start of your turn.
You may remove x cards from hand to make each other player remove x cards from
hand.
Sauron's gaze Play at the start of your turn.
You may reveal the top three cards of the territory deck. Remove two unites of the
revealed territories (one must remain).
(and some more, like
forearmed ...

)
If the decks have no cards left, you shuffle your discard pile and use it now as deck.