I think that scene alone was more than worth the price of admission. & Keanu Reeves? In retrospect I thought he was excellent in the role, & I can't wait for A Scanner Darkly.
Lorenzo di Bonaventura, the producer of "Constantine", recently spoke with SciFi Wire about a possible sequel...
"We'd love to see a new Constantine," he said. "We had a good time making that movie. I'd love to do it again. It's just not in the works right now. ... He's such a great character I'd love to do it again."
Well if it's not in the works, I wouldn't count on seeing it anytime soon... but if the producer was happy with the box office returns, that probably means down the road we'll be hearing more about "Constantine 2".