The story revolves around assassin Bourne uncovering mysteries of his past, which puts him in the cross-hairs of a superkiller. Ramirez is playing the superkiller.
Gael Garcia Bernal was in negotiations to play the role but a deal could not be reached (HR 10/3).
Tony Gilroy, Tom Stoppard, Scott Burns and Paul Attanasio worked on the script.
Ultimatum is being produced by Frank Marshall, Patrick Crowley and Paul L. Sandberg.
South American actor Ramirez might be best known to North American audiences for his work in Domino, the Tony Scott-directed thriller starring Keira Knightley. He recently wrapped production on the Sony feature Vantage Point, directed by Pete Travis and produced by Neil Moritz.
Ramirez is repped by Endeavor, Handprint Entertainment and Hirsch, Wallerstein, Matlof & Fishman.