I had this batmobile the back burner for a while, but a moc by CricketBen encouraged me to finish it.

This version is scaled as close to minifig height as possible, while still having steering wheels and expandable battle mode. The turret does extend, but its kinda difficult to make it, plus you still have to add the barrel on the end. Not to toot my own horn, but I think this is the best version out there.

There are only enough parts for one, but it does include the studs required to make the lights red rather than white.