Hoping that a new album will drop at somepoint during that 'break'. It would make sense if he has material ready for release, or at least close to being finished. He can preview a few different new songs during the first leg of the This Is It residency @ the 02 and basically gauge audience response. If the response is positive, which we all know it will be, then that would be a good song to release as a single.
I expect that he will go back to the States for a while as well to finish up any loose ends, like the album, videos, collabs.. even stuff like lawsuits. He will also want to have time to reflect upon the first leg of the shows and may make little changes, or drastic changes, which is why I got tickets for both legs of the show just incase things change, which I fully expect it to.
But he will mainly be looking for some R & R during that break, letting things like new music and hopefully a new album do the work for him!