I don't quite understand your pesimism prehistorian. Having LBT 13 is more than we had so far. There is nothing absolutely NOTHING indicating that it should be the end to the series. Remember what Charles Grosvenor said. Untill the Roman numerals become too unwieldy I'm quite content to keep making them.
I find the XIV no more unwieldy than the XIII. Let us not ask too early what will be after a happy event in the future when we just learned that there will be a happy event in the future. Don't ask for the third piece of the cake when you have just been given the second.
Let's rejoice that LBT 13 will come!