honestly, the mii costume is probably the best thing going for him, we still don't know that the starling picture is definitively smash related.
Pretty much, and even then there's a small chance the costume would only pop up for a Final Fantasy character's set.
Until Fall starts, we're firmly at an impasse.
There's that word again.
He only teases when he trolls on the short term, he doesn't intentionally mess with people for months.
Case in point, the K. Rool teases were consigned entirely to the August direct, with the Klaptrap AT and banana gun, and finally, Dedede's costume trick (the barrel and rope doesn't count, that one's just a coincidence).
Heck, even his games outside of Smash generally have plots that are established and concluded in one go (even something longer like KI Uprising, with the only possible tease being a joke by the clearly-dead Hades at the end). He doesn't play the long game.
If character absences are seen as teases, that's generally only by complete unintentional accident. Don't attribute to malice that which can also be adequately explained by ineptitude, and all (which is partly the marketing department's fault, seeing as Skull Kid's AT was only revealed on the site, of all things).
I apologize for all that, but I'm tired of the assumption that Sakurai is a Japanese Ed Boon.