More likely a tease for third Girls Remix special.

And cars only excite them because they are forced upon them. I mean, I grew up in a village and until I went to school, I had never seen a single car and certainly didn't want one. So again, it's a cultural thing.
Plus, there are also franchise specifics. Kamen Rider is basically about bikes and so a car doesn't really fit as a main theme. Even riders that transform into a bike are not very popular, because two toys (rider and motorcycle) will bring more profit than one transforming.

At the very least if the bike can transform, Autovajin style, we might actually see it more since it'll be useful to have in fights.

I think there is potential in the option with the bike as a form/part of the form, like Geats and Gotchard.

Color809 has posted a sketch of how Zeztz will look like.

Looks like if Ichigo was an Ultraman, but I'm surprised at how much I like it

Random thought, but what if Taguchi directs the show?

Welcome back Gekiranger! Hope the Takahashi rumor is wrong and we get Yokote instead.

Unfortunately, Color809 has posted that Takahashi is the writer.

Apparently Zeztz is an agent for an organization who fights monsters in the dream world.

Ouch. Well, I'll give it a fair chance anyway. Zeztz being an agent and fighting in dreams sounds cool at least! Kind of reminds me of Neo.