If Tony goes out it was never not gonna be in a blaze of glory after having a significant influence on the plot. I can't believe the amount of people saying "he better not die in the first 5 minutes!" Some of them were probably joking but still...as if Marvel Studios would basically throw away the poster character of the franchise like that. It would be extremely bold and unusual of them if they did (and I did have a split second reaction of "no way!" when Thanos stabbed him in IW), but they're just never going to.