I've collected up a few of the Batmobile kits:
Batman (original movie) Batmobile, Batwing and motorized Batmobile by AMT/Ertl
Batman Returns (2nd movie) Batmobile (with removable engine), Batmissile and Batboat by AMT/Ertl
Batman Forever (3rd movie) Batmobile, Batwing and Batboat by Revell
Batman and Robin (4th movie) Batmobile and Robin’s motorcycle by Revell-Monogram
Batman Begins (5th movie) new Bandai 1/35 scale Batmobile "Tumbler"
Old TV series Barris Batmobile by Imai
Old TV series Batcycle and Batboat by Polar Lights
Comic book version Batmobile and Batplane by Polar Lights
Two original movie Joker Goon Cars since it can be made into a Gotham City police car.
The Blueprinter armored cocoon for the original movie Batmobile.
Both of Polar Lights' Speed Racer Mach 5 race cars in glue and snap kit.
Daisy Duke Jeep and Hogan's Heroes Jeep both by AMT/Ertl
RoboCop police car by AMT/Ertl
Mr. T’s A-Team van by AMT/Ertl
I've got two of the Aliens' (second movie) armored personnel carrier from Halcyon as well as the spacecraft (shuttle from Alien and dropship from Aliens).
Probably missed some. The new Bandai Batmobile looks really nice.