I agree Oumafan,I think it is more to do with Arum than anything. Margarito ahs stated that he is no longe interested in fighting Floyd,and the offer is off the table so it looks like that is done for now. And NO WAY is Tony fighting Rivera,he better not be!! I'd rather he dropped the belt than took that fight,the guys you mentioned would wincrease his credibility more. I see a Clottey fight as the most realistic,I would prefer a Collazo/Quintana fight instead.
And you hit the nail on the head...people are already discrediting a possible Clottey/Quintana match up,saying who have they beat etc etc even though they are good fighters themselves.
I still believe it to be a lose lose for Tony unfortunately.