Board Thread:General Discussion/@comment-11563476-20140323190837/@comment-4696205-20140404133805

We do see Sakurai are bringing back certain characters according to their new releases, like Dedede, Diddy Kong, and Zelda. So Yoshi may return if Yoshi's NEW Island is released in Japan this summer, which is my guess though.

And for the release date, I guess it'll be this fall, if Sakurai's planning to add in more characters as a surprise.