diameter 42mm ( chopard.watchprosite.com
)
As this is the year of Happy Sport, perhaps, what you have been thinking, may likely to happen, a mechanical inside Happy Sport.
The Imperiale, at diameter 40mm, already with Fleurier Ebauche movements.
Will the XL be XLL, to diameter 44mm? Could be a possibility too, like the Pink MM you have 
There will be a customization programme for the Happy Sport. Interesting!
Kong