It's Steve & Tony's first face to face meeting since Civil War three years ago. After watching CW again recently, I'm most curious where Tony's head is at with Steve, and what he's been wanting to say since then.
I'd like Tony to admit that he never reached out to Cap because he was ashamed. He almost killed Bucky in cold blood - who though technically responsible for his parent's deaths, was a brainwashed pawn of Hydra for decades - and Tony realizes he was the one who killed the Avengers, not Steve. Yes, Zemo manipulated the situation, but Zemo knew Tony would snap and go off the deep end and Tony unfortunately proved him right. By the beginning of Infinity War, no one on his side was trying to arrest Steve and his crew anymore, Vision was secretly meeting with Wanda (and Tony kind of knew it) and even Rhodey had had enough of Secretary Ross and the Sokovia Accords tying their hands. T'Challa was secretly sheltering Steve and his crew and even rehabilitated Bucky's mind, despite publicly siding with Tony and the Accords. Tony's pride and ego kept him from responding to Steve's olive branch, and who knows what could have happened if they had all been united? Tony's story since the first Iron Man movie has been he keeps finding he's the villain in his story, not the hero he thinks he is just by virtue of his actions. Whether he manufacturing arms to keep world peace, blowing off Aldrich Killian and thus creating A.I.M. and the Mandarin, creating Ultron to 'protect' the world, or standing against his friends because 'we need to be put in check'(when he really means HE needs to be put in check.)
Steve of course won't be looking for apologies, but he'll be open to sharing the blame, saying that maybe his inability to compromise and accept the lesser of two evils might have put them in the situation they are in. And that after accusing Tony of secret agendas, his own secret one blew up in front of them at exactly the wrong time.
Something along those lines is what I want to see.