Topically, I have been thinking about horses recently. While Gryphons could use a redo, there are some horse models (armored SW horse, barded SW horse, crusade mounts, technically the skeleton horses) that have NEVER gotten a remodel.
It would make sense for there to be a lot of different horse mounts in a revamp expansion, and if the Algarian mount is an armored horse, that may play into it.