Even if E.T. overtakes Born This Way on iTunes, it won't become a real threat for the Hot 100. It is still 80M Overall AI behind.
I honestly do see ET becoming a threat in the future though, but im sure by then BORN THIS WAY will be getting old already.. like end of march beginning of Apr..
Cuz the version with Kanye will get atleast pretty big audience on Rythymic, and the normal version will SMASH pop i think .. that beat is so damn infectious
But right now and probably not anytime in the next few weeks to a month.. it wont serve as a threat