You get enough people interested in playing this game again, they will be breaking down the doors wanting a PC to come up with a uniform structure for competitive play.
Until then, focus on your local areas. How was Decipher successful? They had product champions out doing demos on a regular basis. They established relationships with retailers and gave them incentive to carry their product. These are the things that have to happen for LotR to truly become a thriving game again.
If you get people in a card shop on a regular basis, retailers (at least the ones in my area) will help you promote the game. They want the bodies in their store. They want to sell product.
A PC alone will not revive this game. Is it an important part? Yes. But there has to be tremendous amounts of grass roots support from LotR enthusiasts on the local level.