I'm not doubting your sources or that they actually said that. But every fighter says they're willing to fight anybody and everybody at any weight, etc., etc., etc.

You have to go beyond the words and look at the reasons why a fight will or will not happen.
Mayweather-Hatton is the only matchup here that could realistically happen. I think the odds are that it won't happen, but it's a legit possibility. I think that fight would be a one-sided demolition, but it could still happen because both guys would make big paychecks.
I give DLH-Castillo, DLH-Hatton, and Mayweather-Castillo III a combined 0% chance of happening.