Because in Hollywood-speak, 'a horrible movie' is called a 'cult favorite' and sequels rule the universe, Sony Pictures in 2004 put out 'Starship Troopers 2: Hero of the Federation', a 'rapid-fire sequel to the cult favorite, [in which] the Federation's best Mobile Infantry unit goes back into action against the Bug horde.' A straight-to-DVD masterpiece!
And, according to imdb, they're making a THIRD one starring the original Johnny. Really? Really?
The bad photoshopped poster is worth a visit.