There is no limited edition pre-order that includes the purple ball.
Given how ridiculously popular the ball is, and how trivial the cost of supplying such an item in the form of stress ball would have been (even after branding it with some Destiny-specific injection molded graphics), are you now planning to make such a thing available as swag? If your answer is "no", would you please give me permission in writing to become a millionaire by creating this product and selling it myself?
Anyway, I'm off to buy a generic one at the dollar store and write "Density" on it in black magic marker and clasp it to my (very manly) bosom until September ninth.
So that's 99 cents you've lost already. Regret?
Y U no hire marketers who predict this?
p.s. Love the game, thanks for making it.