According to a couple of sources apparently after the draw between Royler Gracie and Eddie Bravo at the Metamoris event another one of the Gracie clan, Royce, challenged the 10th Planet Jiu Jitsu owner to a Vale Tudo match, citing that Bravo has repeatedly disrespected his family’s name. For anyone that isn’t sure, Vale Tudo basically means “anything goes”- striking, grappling, anything in the realm of hand to hand combat. It was actually the format of the early UFC fights: for example, in one early UFC’s someone pulled a chunk of hair out from their opponent. While that would certainly be not allowed in an event now, I remember watching the match and hearing the commentator say, “well, that’s not not allowed…“
It doesn’t sound like Bravo wants to take up the Gracie brother’s offer, but you never know- stranger things have happened.