“Tiger 3” most closely resembles “ Tiger Zinda Hai ,” a superior sequel and a weirdly sunny hostage thriller set in contemporary Iraq. Unfortunately, Tiger and Zoya’s diplomatic capers now seem predictable, right down to this new movie’s introductory twist: Zoya’s plotting against her own Prime Minister with Pakistani terrorist Aatish Rehman ( Emraan Hashmi ), a disgruntled ex-spy. This time, Tiger’s not just trying to foster good relations between two countries but also trying to keep his family intact. That superficially personal twist doesn’t greatly enhance or subtract from “Tiger 3”’s box-checking charms, including Shah Rukh Khan ’s extended cameo appearance and a heap of Hollywood-cribbed story beats and clichés. “Tiger 3” begins with as much cornball swag as a live-action “G.I. Joe” cartoon. Tiger boldly mounts a one-man rescue mission at the personal request of Maithili Menon (Revathi), the no-nonsense chief of India’s Research and Analysis Wing (...