From what I have heard as well, they have been developing a LT 29er that is not a "Frankenbike" so to speak. It will replace the HTLT. Yes, as was stated, they quickly did some testing on the new rear triangle with the linkage and combined it with the Hightower front triangle. Because they have their own R&D carbon composite making capability in SC, they can quickly create parts for testing. The HTLT was a quick rush into a big growing segment they were not part of. So far it has paid off. I will say I was very pleased with the HTLT and the shock they chose for it.
There is new one on the way, could even happen this year, who knows, but the HTLT is so good go for it now and sell it later. Why wait? Tomorrow may never come. Besides, there will always be something new.