Nothing, nothing can make me spend money on a game that frankly deserve to die at this point. I am boycotting SK until it can get its act together, proof to me that it is worthy to be saved.
As for promo that I never want to see, it would be some type of paywall weapon that just breaks the game, *cough*mixmaster*cough*
100% chance of kat hiss suit.
Any lower chance than that, I'm better off buying it from someone else who got it in a box and didn't want it.