I think, whether he wants to or not, whether he is guilty or not, Farah will HAVE to break ties, especially after this latest revelation about the needles. He has to preserve his good standing with UK Athletics, and maintain his image, to try to repair the damage and stay focused on his racing.
As for AlSal and NOP, I think it will go down like this: USADA and WADA will investigate. And more and more people will come forward. The guilty especially will speak out, if they feel they can get away without bans, or reduced punishments for cooperating (see Tyson Gay).
As more people speak out, Nike will circle the wagons. NOP may disband, or perhaps rebrand. Al Sal will be forced to retire, and may be at risk of federal charges for running his own pharmacy.
Rupp, I fear, is n the biggest trouble of them all. So inextricably tied to AlSal, that even if he came clean, he'd still come away with a pretty serious ban. I never thought I could've imagined it, but I think his 2012 silver is in very, very real jeopardy.