Too bad the original Bulletstorm didn't sell well, it was a fun game. People can Fly founder Adrian Chmielarz has stated that Bulletstorm 2 would have been "an amazing game" and that it was going to be a very unique experience:
"It was gonna be actually more insane in a way. It’s still kinda believable but the pulpiness and the craziness of it was through the roof."
"We analyzed what we could for the sequel, what we have control over, and it would be an amazing game, but it was also very risky, because you don’t have that many examples of games where the first part was doing so-so; it wasn’t a failure but it was very so-so. And then the sequel suddenly kaboomed. So it was a big risk."
Maybe one day we we still get the sequel, who knows, it's a sad day when great games don't get them, that's for sure.