Well, I only know of two forms of driving, vehicles and nails, and unless this is Kamen Rider Power Tools, I think it's pretty clear we're going to at least be engine themed, if not full on vehicle.
So... I don't THINK we're going to have Kamen Rider Cars, but perhaps we'll see a little more variety in vehicles, I mean, there's only so many ways to make a motorcycle and it might do the franchise some good to break some new ground, as I think Gaim WILL be successful(Heck, I think it IS right now, but I don't know the numbers nor have the knowledge to understand them anyway.) so they'll have a little bit of breathing room to toy with new ideas, as they won't have as much pressure on them to be successful, allowing them to try a few off-formula gimmickry if nothing else, as, while it has been very off-formula as far as the show itself is concerned, Gaim's toys actually don't have that much in the way of innovation, aside from the Arms Change gimmick(Which I've heard has worked out pretty well.) everything has been seen in some capacity before, heck, even just in the Neo-Heisei alone. Removing the trinket and attaching to the weapon for a finisher? W. Sliding something on top of it to perform a different one? OOO. Heck, the Lockseeds themselves most resemble the astroswitches in their function and play pattern, but I'm getting off topic REALLY bad.
So, perhaps we'll see some new vehicular transportation types, but I'm mostly seeing things like ATVs, Jet skis and other "ridable" vehicles. I mean, it's still part of the name.