It doesn't have to be the exact same thing to clearly be an inspiration. Think about the Bhaal saga in simple terms - you have a lot of people with special powers who are connected to each other, and once only one of them is left he gets a big prize. of course, there is much that's going on if you zoom in, but in the macro level it's quite the same, and I don't see what's wrong with it. Highlander is a great movie with a great premise, and so is BG.
