Paramount has been shaping a Jack Ryan reboot for some time. Last year, they were in negotiations with Sam Raimi to come on board to direct or develop a franchise, but he returned to the webslinger instead. Last December, Hossein Amini came aboard to write a new installment, which remains the draft Paramount is working with. There's no director attached yet.
Stepping into the CIA shoes of Jack Ryan really puts Pine well onto the Harrison Ford track. Not many actors can land one iconic character in their careers, let alone two. Of course, "iconic" is a loose compliment for Ryan as he's really more of a cool name than a strikingly memorable character. (Admit it -- the movies are cool, but Ryan is like Tom Cruise's Ethan Hunt --he's just kind of moving things along in a bad-ass fashion.) Perhaps Pine can change that, and reboot Ryan into something clear and present in pop culture.