Just a guessing... but I think it was not casuality all of them (well.. not Simon) appear in Roger concert a few weeks ago... I mean: all of them in London at the same time...
I was thinking the same, there they are, all nicely spruced up - recent trips to the hair salon (or Mary's scissors), looking good and healthy - Perhaps!!! ready for promotional shots for a new album or tour announcement
I've already mentally started putting aside cash and possible travel dates for a few Gigs. Reeves is busy till mid October, so need to take all summer holiday trips before then - Just in Case!
Thanks for posting. 'Tis quite a lengthy group of artists. Seeing the Nick Cave's contribution reminds of the recent loss of his son - very tragic and sad. I am a big fan of his as well and I was deeply saddened to learn of his loss.