Starfighter - There's no way they can remake this film. It's a great movie and today they just won't do it justice.
Short Circuit - eh, I liked the first one...never saw the second one, so they can remake it and chances are I'll go and rent it, but really why not leave it alone, I don't see a big market for this type of movie now. It'll be like remaking Ghost Busters, you'd get a nostalgia hit, but little else, IMO.
Porkys - I assume this means the recently released Trilogy is selling quite well, otherwise I don't think they'd revisit this, American Pie's have pretty much killed off this market, pretty much its a whole lot of the same and is getting stale.
Dune - Please NO, if anything I want them to pick up where Sci-Fi left off with the Children of Dune miniseries, I want them to finish the last 3 original and 2 new books off closing out the remaining of Frank Herbert's books with movies. Although I didn't care much for the movie with Sting, I enjoyed the Sci-Fi version of Dune.