Except for the summer festivals, and the summer holydays (so he can be at home during school days with his daughters) I don't get why touring always between May/August.
In the end, from May to June he plays indoor arenas. That means that a tour between september/december would make sense as well.
My guess is that the death line date for the secret project (the main speculation is a Local Hero musical) is after March (which is the date when they think thesolo album will be finished) so maybe MK has to be comitted in some way in that months that he usually would be touring with whatever would happen with the secret project (the musical).
A tour is always planned with plenty of time, what we don't know (and we won't be tell about it) is if they already had booked venues, in hold, just in case they have to cancel.
But I guess that the big cities where MK plays have several venues that fit with him. Just think in London... MK could play at the RAH, also at Wembley Arena, O2 Arena or even the Hammersmith Odeon. It would be rare if all are booked at the same time. Or just think in big cities that are close between them, Liverpool and Manchester, for example... I'm sure they can manage to organize a good tour in big venues in short time if needed.
My wish, is an autumm/winter indoor tour.