Oh man I'm so anxious to see everything they do next summer/tour if the first thing announced is Wrigley Field. Even though I could totally see them doing European festivals in the beginning of summer and then doing the US at the end of summer/into fall, I'm still crossing my fingers for Bonnaroo. It's all I want!
Fleetwood Mac are on a huge tour that is taking them all over the country, specifically through Tennessee in March. They are not likely. They are possible in the sense that anything is possible, but them doing the summer in Europe is infinitely more likely.