AION 2 pre-registration rewards are Pagati plus one selectable pet from Black Smoke Murute, Konutin Worker, Silver Blade Rotan or Papis. See status and claim caveats.
Steam wishlisting is useful for store notifications but is not the same action as completing NC’s pre-registration form.
Pre-registration is free. It is separate from the paid Founder’s Pack. Pre-registering does not grant September 30 Advance Access, and buying a Founder’s Pack should not be assumed to complete pre-registration for you.