From the interviews I've seen, Spielberg always wanted to do something with the cryocan. It's why he had the lingering shot of it getting covered in mud. A recurring comment from him was that the can was sitting there, waiting to rear 8 ugly heads. That's about the extent of my knowledge on that.
There was also meant to be an animated series that would have been the spiritual sequel to the movie. These were especially popular in the '90s with such "TAS" as Batman, Godzilla, and MIB. It made it to concept, but Spielberg turned it down because he wanted Crichton to write the sequel book. Spielberg and Crichton agreed on the premise of "hunters vs gatherers" and each went off to work on their own version of that concept. This is why the film is so different from the novel.
_______________SOMETHING HAS SURVIVED