revolution - motorized + thomas and friends=?

It's not a third range per se, and the official name is simply Motorized (which started out as a rebrand of TrackMaster [Revolution]); the elements such as the track system and motorised chassis are reused from Revolution, but the vehicle designs and other things are updated to reflect All Engines Go (the 2D animated reboot of Thomas & Friends). The main thing that makes it "too" different is the vehicles are now much taller and won't fit under most bridges/tunnels/risers. See the "Thomas 2021 Reboot" thread for more information.