This is all wishful thinking and won't happen, but given the connectivity between film and TV, and because I loved the series, I would love if the Swamp Thing film was basically a season 2/continuation of the quickly departed DC Universe series. You already have the background in that first season, and the DCU brain trust could just say 'Hey, if you're interested in the background, check out the first season of this show.' You could retroactively tie that into the film, especially since the show ended on a cliffhanger.
Again, it won't happen, and this is just my love of the show talking, but I would love if that was the case. I maintain that Swamp Thing has probably the best sense of atmosphere and tone that I've seen in a comic book TV show.