MMA Fighters Lined Up?

After all the heat I've taken over the past 6 years or so, here we are. They HAVE an event in Brazil called Rio Heroes of real Vale Tudo origin and I do NOT see any MMA (known) fighters lining up to go over there.

As a matter of fact, I don't see a damn single one!

Seems as if some of them would want to

go over and "proove" themselves.....

Where are they?

Why would they want to go through the expense of traveling over there to fight for nothing, when they can stay right here and fight for nothing?