Khan should only be fighting the very best from here on in... so with that said, bring on Gavin Rees!
The Bradley/Alexander winner. But he'll make more/same amount of money with a lower risk voluntary defence so it'll be Ortiz, Peterson, Holt or Guzman.
If he wants to avenge his loss to Prescott it starts to be last chance to do that. If his next fight is in UK then Prescott fight would be ideal for him. After Breidis unification fight.
Bradley is considered the man at 140, so a Bradley-Khan showdown would be one for the ages and the one everyone would want to see. A good US vs England rivalry as well. Other than Pacquiao-Mayweather, Martinez-Mayweather, and Klitschko-Haye, this is the fight I'd want to see.
Either Judah or Presscott. A fight with Berto as VW suggested in the news section would be a catastrophic fight for Khan, possibly sending him away into the sunset.
Being from Boston, I think the BAA should try to entice Amir to run the Boston Marathon in April. After Saturday night, I am convinced that he could easily beat the Kenyans.