So, about a year from now, "Unstoppable" is supposed to be opening with Chris co-starring in it with Denzel Washington. It's filming in Pennsylvania now. I don't know why it's taking so long, but they are still saying November 2010 at IMDb. With him co-starring, there should be an awful lot of Chris on screen.
Anyway, so here is what that one is about, from what I can gather from various sources at IMDb.
"Unstoppable": a 20th Century Fox drama about a runaway train carrying a cargo of toxic chemicals. Pits an engineer and his conductor in a race against time. They're chasing the runaway train in a separate locomotive and need to bring it under control before it derails on a curve and causes a toxic spill that will decimate a town.
This movie is based on a true story about an event that occurred in Ohio on 15 May 2001 involving a train with 47 cars taking an unmanned three and a half hour jaunt through the Ohio countryside carrying toxic chemicals. The authorities feared that the train may derail itself in a populated area, spilling the chemicals everywhere.
Denzel will play an old train conductor who is about to be laid off, and the film takes place on the day that he is training his young replacement, played by Chris Pine, and on the replacement's first day on the job.