Board Thread:General Discussion/@comment-4479676-20170201051932/@comment-27020644-20170201160507

Evangeline Lilly said in an interview that she would be appearing in Avengers 4. She said Ant-Man and the Wasp would be like an origin story for her being a hero. So it will at least be connected to Avengers 4.

As for Scott, I think he will be in Infinity War. However, just because he saved the world from Thanos doesn't mean that he, along with the rest of Team Cap, are now free from being criminals. I could totally see Ross arresting Team Cap, or Team Cap willingly surrendering, but Scott shrinks and leaves before being arrested. That would be why Ross is looking for him in Ant-Man and the Wasp.