He’ll Attempt To Convince Cap To Join Him First

As Iron Man, Tony Stark has been a “shoot first, ask questions later” kind of guy, but this movie will force a change in him in that respect.
The titular war won’t just happen instantaneously – Stark and Captain America won’t just fight as soon as they disagree with each other over the Sokovia Accords and Bucky Barnes – Stark will attempt to pull Cap over to the dark side as a means of avoiding the inevitable battle (which, of course, won’t work – thanks in no small part to Stark’s mission to bring Bucky down).
While this might look like it’s attempting to show Stark’s reasonable and compassionate side, he won’t be doing it for selfless reasons – it’s something he will have been encouraged to do by Baron Zemo and other antagonistic individuals, who will have known in advance that Captain America would turn Stark down – and Captain America rejecting Stark’s offer will only make him angrier and more determined to beat the super soldier and his team down.
