From the people I spoke with over the 1/2 marathon weekend, they said DL does plan on having it again next year. Keep in mind that the DL 1/2 Marathon weekend has been moved up to Labor Day weekend for next year. That means expect it to be super crowded that weekend. Your best bet is to check out this link from time to time for more information.
I hope they have it because my DW enjoyed it and my kids had a great time running in the kids races!