It looks like New Line Cinema is planning to develop Rush Hour 4. In an interview with IGN, Jackie Chan admitted that the studio wants to make another film in the franchise, but they don't have a script and until there is one, he's not interested. Here's his exact quote:
“Lately they want to make Rush Hour 4. I said ‘No, show me the script first. I don’t need another Rush Hour 4. You need Rush Hour 4. Show me the script.’ I don’t want to do a rubbish script just because they want to make the movie.”
Talk of a fourth Rush Hour movie started seven years ago, but thankfully nothing ever materialized from it. The last thing we reported on it was back in 2012 when producer Arthur Sarkissian, said that he was working with Chan and Chris Tucker on it. Here's what he had to say about that and the direction he was looking to take it at the time:
"I am working on Rush Hour 4 right now with Chris Tucker and Jackie Chan. I’m trying to do it closer to how I did Rush Hour 1, more down to earth, more gritty, introduce two new characters and make it real the way the first one was. I personally was not happy with the third one. I thought 1 and 2 were very good. I think 3 got out of hand a little bit. It’s not a matter of just bringing them back to do another segment of that or a sequel to it by putting them in another city and having them bicker. I don’t want that. I want something new."
I have no idea if this is still what they will be going for, but it gives you an idea of where their heads were at two years ago. I enjoyed the first Rush Hour movie, but didn't really care for the second or third. I personally don't care to see another one. They should just let this franchise go. Hopefully nothing ever happens with it.