Okay lets get straight to the point. In a interview with Jeremy Renner he released the fate of his archer character. He has said he does not die. Now in the comics only two characters Wolverine and Scarlet Witch are the only ones that survive ultron. That means that they're just replacing Wolverine with Hawkeye. So scarlet witch is gunna descover the time gem, take then back in time and convince Ant-Man or in this case Robert downey Jr(because there is no Iron man without RDJR) not to build Ultron.