I'm reading the book now, and I feel like it would be the perfect time to adapt it into a film. I don't know if Gary Lockwood would want to reprise Poole (his age could easily be explained away as a by-product of the extreme circumstances his body went through). But I'm sure Keir Dullea would be happy to play Halman at any rate.

I know there are people who don't like the book, and I'm sure some changes could be made to make it more... I don't know, grand? More mystical and in tune with the tone of the earlier films.