I don't know if it has anything to do with flytraps or if they just thought it was a cool word, but I found this on SciFi Wire:
Warner Moves Into Dionaea House
Warner Brothers has pre-emptively picked up the spec script The Dionaea House by Eric Heisserer for David Heyman to produce via his Heyday Films banner, according to The Hollywood Reporter. The story follows a married man who has grown apart from his old friends. When one of them commits a double-murder suicide, the men feel compelled to investigate, eventually stumbling upon an evil force that perpetuates itself through tract housing, the trade paper reported.
Heisserer created a Web site last fall to build the mythology of the project. The site, which ended up getting millions of hits, was filled with fictional correspondence between the man and a friend who has since disappeared, the trade paper reported.