We missed this one last month. EA has announced that it is not working on an Earth & Beyond expansion pack. From what I've seen the first just didn't sell well enough to warrant it, however Ultima Online expansions in the past have done well to invigorate the game. There are a number of things they've officially stated are not in the works, however EA has countered that by saying they are committed to generating regular content for the game.
All of our resources are being used to develop additional content for the existing game including sectors, missions, epic encounters, updating skills, holiday events and items.You can read the full update here. It's great to see that holiday events rank up there with new sectors and epic encounters.