When you're reading an interview with Dennis Hopper, you expect him to admit things like the following: that he once sold a priceless Lichtenstein painting for a thousand bucks, attended an orgy with Natalie Wood, and used to drink "half a gallon of rum and 30 beers a day." We're talking about Dennis Hopper, here. In order to surprise us, he's going to have to do a lot better than that -- and so he has. During an interesting interview with the Guardian that went up yesterday, Hopper held forth with some super-cryptic mumblings about his possible appearance in Speed 3 (!)
To back up a bit, it's the inteviewer who first brings up the topic, claiming to have some insider knowledge about it. He tells us, the reader, that the film is "due to include" a performance by Hopper, and that it's his intention to ask Hopper "plenty of questions" about it. I certainly hope so. When he finally gets around to it, however, the only thing Hopper will say is this: "It's a river of shit from which I have tried to extract some gold." Huh? The Speed series is a river of shit? The process of resurrecting your character for a third film when he clearly died in the first film is a river of shit? What are you talking about, druggy?
I personally think what we have here is an over-zealous reporter trying to make some news where none exists. Speed 2 more or less bombed at the box-office, when you consider its sizeable budget and the expectations that everyone had from the previous film. I've certainly heard nothing about a Speed 3, and as far as I know, no one is even thinking about it. So unless the movie is currently being filmed in complete secrecy under the title All About Steve (or Cloverfield), I think we can disregard this.