Avengers 4 : How Ironman Appear Again After Avengers 4 ?

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In avengers infinity war , The large scale death of our heroes shocked the whole marvel fan community but we have faith that they are going to be revived in Avengers 4 . But the writers also told that we are going see few superhero death that may not be resurrected. So most probably that death would include Iron Man . But a fan theory suggest that we could see Iron Man even after its death .

So its all starts in the civil war comic series . During the fight between Captain Marvel and Iron Man , Tony gets badly injured and he realized at this rate he is going to die.So he did a experiment on himself were he turned himself into a AI or Artificial intelligence and continued his journey in the comic.
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In this form only he became mentor of Riri Williams were he helped Riri to make a suit and become Iron Heart.SO this theory fits perfectly in MCU . In a interview RDJ told that he is quitting Iron Man because its been 10 years since he is paying this role and its now time to retire but he want to be part of MCU but behind cameras .So this makes a win win situation where we can see Iron man and RDJ can also satisfy his wish . So if Tony becomes a AI in MCU then there are high chances of Introduction of Iron Heart or he can work as mentor of Spiderman.