A:AnswerI don't know what you mean by late opening. But I've ordered this just a month ahead. And according to my order status it will arrive to my place on Sept. 6. It hasn't change since.
And I'm not sure if you can still pre-order it now in Best Buy.
A:AnswerNo, that is a random drop in the game. The weapon is exclusive to PS4 for now, but it's not given to you from the start if that's your question...
A:AnswerYes, you will get the beta code if you pre-order this ps4 bundle. The product page states this and if you add the bundle to your cart it shows the beta code as a free gift with purchase.
A:AnswerIt will be emailed to you when you purchase the bundle you can use it for ps4 Xbox one or PC. Before you do check the date for the beta it may have past at: https://www.destinythegame.com/buy