It'll be interesting to see what happens next.
I definitely don't reckon there'll be new material. I think we'll see more of them as a group (performing one-off concerts, like Pride) but their management will think carefully about touring again on this scale. Let's face it, the Sarah story was a big angle this time around...how would it be without her, what would the dynamics be like, how would they honour her. Next time, they won't have that. There is definitely an appetite for them to continue but they (or their management) won't want it to be a case of diminishing returns as time goes on. My guess is that they'll do another big tour 5-6 years from now, and then that will be the last one. Weird to think some of them would be heading towards 50 by that point!
I feel so flat now that the concert is over. I loved it so much!!!! Wish it will still in the future to look forward to.