Well, it'd certainly be great to see a 3-ship of MK26 aeroplanes flying together in 2013; let's hope that will catalyse interest and more will then follow.
As the MK26 is a non-EASA Annex II aeroplane, there will be no need for an aerobatic rating; however, any pilots wishing to conduct aerobatics on the MK26 would be strongly recommended to take the AOPA/BAeA Basic Aerobatic Course if they have no previous aerobatic experience.