Anyone see the spino yet?

I don't think it out yet

Yes it is
https://twitter.com/R3XB0X/status/678279329005064192

If they make another repaint of the Para Zord, it's only change should be to make the yellow gold to match that of the Black T-Rex zord.

Does any know why the tail is so stubby?

They're not listed as in stock, but official listings for the Black T-Rex and Spinosaurus have gone up on Target's website: Spino Zord Black T-Rex

Something disconcerting on the Spino Zord's page: It shows the Spino Megazord holding the tail fin as a rifle. With the styled fin on the top of the gun acting as a blade, I hope the handle peg flips all the way out so it can hold the fin as an axe at least. Pretty much confirms though that there is no boomerang.
Between this, the extra cannons on the Ptera Zord, and the Ammonite, is this a case of "lol Americans like guns. Let's give them extra guns"?

UPDATE:
And now the Spinosaurus is available on TRU's website. No Black T-Rex yet.