What will be available in the store when the game is released?

I am considering buying a package, but I was wondering what will be available in the store once the game is released. I see games now days doing this type of business model (micro-transactions) and I was wondering what we will be able to get?

I saw extra character slots and stash space, but there has to be more than that, right? I hope they're not selling orbs and stuff like that, but I'd assume that's their best way to earn money.

Thanks in advance!

There will be no pay to win items (like orbs)
That was stated by GGG.

I assume that: (quote myself)

"

The cash shop will be full of cosmetic/visual/fun items.
(...)
I can imagine tons of glowing, shining clothes, dyes, hair styles. Maybe even face editor?
Possibly skill animations and gestures? Pets!
GGG must work hard on this part because it is their only source of income.

Fire cats! ;)

And more gore, which is awesome.