As I had expected, the Legends line is the new Generations line, as the next ones to be revealed aren't Beast themed, but are current Hasbro Generations figures - Tankor, Whirl and Roadbuster.

It makes for an interesting three-some, as someone at that TFW link has pointed out the "coincidence" of these three toys being released together, to the set of three Dorvak toys from the 80s.