I don't know why I bother. You obviously don't understand the basic concept of taking advice from people who know better.
I've been a member of this site for three years, and you've been here for five months. Which of us do you think has a better idea of what qualifies as spam?
The only release dates you'll be able to trust are the ones on the Smash Bros and Nintendo websites. Anything from eBay, Amazon or your local video game store will be pure speculation until it's announced on either of the aforementioned sites.