I still have the Batman/Batman Returns figures from Kenner. I have a few from Forever also, but even back then I was disappointed with all the recasts and changes(mainly the departure of Michael Keaton, the redesigned Batmobile, and the lack of Elfman music) so I wasn't as interested in the figures as I normally was.
The best figures out of the first two lines were Shadow Wing Batman which had pop-up arms, Bruce Wayne which can change into Batman, Catwoman and the two Joker figures. The first Joker figure's skin could change from chalk white to Caucasian in cold water. My most prized Batman figure at the time was probably the 15 inch Batman Returns figure. For the time it had a very good sculpt and likeness to Michael Keaton, and had all the suit details that the smaller figures lacked due to being simple repaints of the first movie figures. I was never all that interested in the repaints. I was also disappointed that due to the outcry from parents at the time, they never made a Devito Penguin and opted instead to re-release the Super Powers version with a new paint scheme.
I had a few of the vehicles(most notably the Batmissile and Batskiboat) and the Returns Batcave playset, which was originally intended for the first movie line. The Batcave portion of the set includes a computer bank which more closely resembles the Batcomputer from the first movie with it's multiple monitors, and the smaller batsuit vault which contains the first movie's suit and can be used to change Bruce into Batman if you have both figures. There's even an Arctic World playset which is really just Axis Chemicals but with a few stickers to make it appear to be some sort of refrigeration machine to keep the penguin habitat cold. What makes it most obviously an Axis playset is the catwalk, which has a portion that breaks away and drops a figure into a plastic cup below, which I believe is supposed to represent a vat of chemicals. Remember, one of the Joker figure's head changes color in cold water, so you could potentially recreate the Joker's birth here.
Though I wasn't interested in the source material, the good thing about the Forever line is there was more than just paint to differentiate the Batman figures. They actually had unique sculpts. Unfortunately, they forgot to make a figure based on the panther suit, but they did make one based on the sonar suit, which was part of a two-pack with a basic Robin figure.