A draft opinion has never been leaked before in the history of the court.
Obviously the intent was intimidation - whoever leaked it knew that they could not convince any of the Justices to change their stance so they attempted to get the abortion lobby to do it for them. I think, as Alito wrote in his draft, the Justices won't pay much mind to public opinion, and will do what they believe to be their legal duty.
I also think, however, that this sets a bad precedent. Like the impeachments of Trump guaranteed that every future Democratic president for the foreseeable future will be impeached regardless of the merits of the impeachment, this too means that if there is ever a decision that would come down like Obergefell or Sebelius that would piss off the right, draft decisions will get leaked.
It's a shitty day for the Supreme Court, for judicial ethics (I don't believe that a clerk sent this out without a blessing from one of the three), and for judicial independence.
My only hope is that the Justices refuse to back down to the pressure of the abortion lobby and the media and double down on this decision to show they will not be intimidated into changing their minds or forsaking their legal duty.