Nope, no clue, he's very good about keeping that stuff secret, but if I had to guess (and insert a HUGE amount of wishful thinking) I'd say the production of A Little Night Music they're planning for this winter. I think it's supposed to open in December, and I THINK (could be way off, my brain is like swiss cheese) at the Kerr. It's the production Trevor Nunn is directing. Apparently he wants to skew the casting very young, so that Frederik is 40 rather than 50-something. As is Desiree, and so on. (I think they want Carl-Magnus to be in his 20's!).
But anyway, that's just my wishful thinking/guessing.
Sarcasm is an allergic reaction to stupid people.