They don't currently have plans to repeat it, but it's still possible they could decide to if enough people seem to want it, so it's worth periodically reminding them about here on the forums. It was a popular event with popular rewards. Many people who either missed it or weren't high-level enough for its later stages would like a repeat. (I myself fall into the later category. I got all the way up to the level 45 quest on one of my characters, but only the early stages of it on my other two characters, including the one I play the most.)

My vote: Have the FFXIII:LR tie-in event repeat as an annual thing until it's time to replace it with a FFXV tie-in event (which could then itself become an annual thing).