I'm gonna do what I did in the past with MERP. That is, plough through the History of Middle Earth books (all of em), and pull out a few interesting historical settings. Then run a campaign in each, which are all linked by one item/person/place.
Last time around it was a fortress which I had designed as the focal point of the campaigns, starting as a single hut, then in the next campaign (set a few hundred years after the first) a new group of adventurers encountered the community there. Next campaign, it was a fortress. The final campaign was the downfall of the fortress.
I prefer this history style of campaigning as it prevents you getting bogged down in one setting for too long (how many times have games ended up as just fight fests because the story seeds have worn thin). It also adds a sense of completion to the whole saga, and the players feel that they have played a major part in the History of Middle Earth (particularly if you tie their quests in with the official stuff).
Dehann - "Why don't we just throw that round thing at 'em?"
Samson - "Because, Mr Dehann, that is the saucer section and we are on it!!"