Zen Studios explains Zen Pinball 2's delayClick Here to View Story
“Zen Pinball 2 is the first game of its kind on any Nintendo system (free platform download with paid DLC) so we’re working with Nintendo to make sure there are no issues at launch. It’s a first for them, so we’re doing what we can to make sure everything goes smoothly, even if it means delaying a bit.” - Zen Studios rep
I guess when you're first, you have to make sure you do things right! I'll gladly wait a few more weeks to get an experience as close to perfect as possible.