Well, he could potentially reshape the entire universe. He might use the stones to bring back all those who were lost in the Snap. Maybe he could even create a new, perfect world where there is no more war or suffering.
His character might become more confident, knowing he has the most powerful items in the universe at his disposal. He could be more decisive in his actions and less hesitant about taking risks.
Tony Stark doesn't die in the Infinity War comic. The comic takes a different path compared to the movie adaptation, and his character has a different outcome.
Yes, in some fanfiction he can survive. Writers often give him special abilities or plot armor that allows him to endure the power of the Infinity Gauntlet. Maybe he has some sort of new technology that he's developed which can help him manage the power and not be completely destroyed by it.
One interesting fanfiction could be where Tony Stark uses the Infinity Gauntlet to reverse the Snap in a completely different way than in the movies. Maybe he has to sacrifice his own intellect to power the Gauntlet fully, leading to a whole new set of challenges for the Avengers to deal with.
Well, perhaps the plot could involve Tony Stark's quest to collect all the Infinity Stones for some noble purpose. Maybe he wants to use their power to prevent a greater threat to the universe than Thanos ever was.
Tony Stark's death in the Infinity War comics is quite a complex event. It involves a series of battles and decisions that ultimately lead to his demise.