The Russos were actually at several panels for Wizard World New Orleans so expect more news from the fan expo to make its way online in the coming days. In one of their smaller panels, the Russo touched on their desire to shine the spotlight on Avengers members in Infinity War who have yet to receive their own "A story arc". If true, it's likely that Infinity War won't be told through the eyes of any of The Avengers who have received their own standalone movie. Here's what Joe Russo stated.
"Everything is finite, right? Nothing can last forever. It's cyclical. Some New Avengers in phase 4 are going to become prominent and then maybe some Avengers might not be around anymore. So, we'll see how all this plays out but you have to treat every character with respect. I think it's interesting that if you've seen four or five movies with the lead character having an arc, I want to see some story telling from some of the secondary characters. We're focusing on that right now with Infinity War while we're breaking into those movies, [asking] which characters can we pull to the forefront who potentially haven't had their own 'A' story arc to this point. I think you'll see that the supporting Avengers are going to become primary Avengers."
In analyzing Joe Russo's comments, that would seem to rule out characters like Thor (Chris Hemsworth), Captain America (Chris Evans), Ant-Man (Paul Rudd), Iron Man (Robert Downey Jr.) and Doctor Strange (Benedict Cumberbatch). By the time Avengers: Infinity War Part 1 is released on May 04, 2018, we'll also have seen solo films from Black Panther (Chadwick Boseman) and Spider-Man (Tom Holland). In looking at the existing roster of Avengers, that would leave Scarlet Witch (Elizabeth Olsen), Falcon (Anthony Mackie), Hulk (Mark Ruffalo), War Machine (Don Cheadle) and Vision (Paul Bettany) as strong candidates to have the spotlight shined on them in Infinity War. It's also possible that the focus could be on Black Widow (Scarlett Johansson), Hawkeye (Jeremy Renner) and Winter Soldier (Sebastian Stan) though it's arguable that these three have already received "A story arcs". Consideration also has to be given to new characters that could be introduced. There's a solo Captain Marvel film slated for release on March 8, 2019 but it's possible that the character could first be introduced in Infinity War, similar to how Spider-Man is being introduced in Captain America: Civil War.