At this point in time, and considering the "flops" he's made and/or far from challenging roles, if they did make yet another GF, what harm would it do him to take part? It would boost the movie and give him another credible (although maybe worn-out?) role.
TIS
"Mankind must put an end to war before war puts an end to mankind. War will exist until that distant day when the conscientious objector enjoys the same reputation and prestige that the warrior does today." JFK
