But it appears that the spacecraft spin, orbital motion, and planetary rotation are all taken into account to reconstruct the image later, and the image is four-banded (R,G,B and some "methane" frequency (probably in the near IR) which allows some stereoscopic information to be generated as well.

That's quite a bit more sophisticated than the "pushbroom" scanners I'm familiar with from the '70s and '80s, where a rotating mirror whipped the image past a set of CCD sensors, and where the effect of spacecraft motion was subtracted later during data reduction and processing. Back then, only a slight twist had to be removed from the image (by resampling the data) to compensate for the rotation of the earth under the platform.

I presume the resulting imagery will be fully rectified for public consumption (these purely geometrical effects removed and the resulting map flattened out and rubber-sheeted) to give an image that resembles more or less what we think of as a map projection.

Image processing and technology has come a long way since I meddled in it...

I'm appalled at how much I've missed.