I think you're correct. I haven't seen the high-priced "intelligent" battery advertised since. In any case, I ordered the Combo kit, which comes with 2 spares, as well as some other stuff. Also ordered: A lens sunshade, landing gear extender, joystick protector, and the lanyard adaptor. Next will be the 6-filter pak (4 ND and a couple of polarizers. I'm going to make my own adjustable lanyard with some stuff from Ace Hardware. I plan to fly in urban environs, so I may get a range extender if I have connectivity issues.
I'm already looking forward to the Mavic Pro II. I think I can sell my original Mavic Pro at a profit in Australia next year.