In an interview with a South American website clarin.com, Paul McCartney has explained his projects. He's working on songs for a new record.
Here is an extract of this interview : "I have in mind a few things for after the tour. I have always been new development projects. I am currently working on composing new songs for what is to be a new studio album, which will record the next year. And while I'm preparing music for a ballet. It's very interesting, unlike anything I've ever done. We will also continue remastering my previous albums. Whenever I have something to do. I am very fortunate to be able to do what I love. Always the last day of anything is the first of something new."