Mega Man Zero/Zx Legacy Collection (#) /Switch

Is there download?

Why is this sold out everywhere, and why is only the Switch version so expensive?

Will this collection also include the e-reader add-ons like the nintendo ds version?

Being a collection of the zero and zx games, i assume it will have zero 1, 2, 3, 4, zx, and zx advent. am i correct, or will there be less or more?