I'm gonna ask this here since it's somewhat relevant and not worth a new thread. Are the Masterworks a finite series? Finite as in there will be a set number of volumes? Or does Marvel just keep on putting new volumes out on whatever whim makes sense to them?

I ask cause on Amazon, they show pre-orders for Marvel Masterworks not yet listed on this site. I don't know if all the volumes that will ever be released has been defined yet or if it's a mystery to all of us.