AA has consistently voiced his desire to fight in the US. I don't see why he wouldn't want a chance to showcase his talent in the US. Dirrell doesn't have a big following in general and is from Flint, Michigan, a location not likely to have the fight. It could be at MSG/Wamu theatre or where Froch fought Taylor in Conn. On the other hand, there is a big Armenian polulation in the LA area, maybe a casino around there...

To the question posed - what motivation do Dirrell or Taylor/Green have to remain in the tournament if they lose their next matches? - the answer is money. I don't know the contract specifics, but Dirrell and Taylor/Green are guaranteed another big fight and another chance to walk away with a sizable purse. For Taylor, that means he fights Kessler, which in Europe/Denmark is a big money fight, and really in the US is as big of a fight as Froch/Taylor was. For Dirrell, it is a face off between two Olympic partners, a sizable purse, not to mention big chance at redeeming himself even if he is coming off of two losses.