Supposedly, that's the end of Shannara. Terry Brooks claims that The Last Druid was the latest he intends to go in the in-world timeline. This series was supposed to radically alter the Four Lands forever, and I was expecting something big. The first couple of books were promising, with the Skaar invasion and the fall of the current Druid Order (the Fifth?); the Skaar were such a compelling, dominant force that it seemed certain that they were going to be in the Four Lands to stay.
There's something vaguely amusing about the fact that as I go through and read The Fall of Shannara series, I find myself most interested by, and rooting for, the invading Skaar and their hyper-competent Princess Ajin. It's not that I don't like the other characters (most of them, anyway), or that Brooks hasn't done a good job at making them sympathetic. To me, though, Princess Ajin is exactly what the best characters should be.