Actually, Takada as one of the biggest names in pro wrestling, lost the rematch to Rickson at Pride 4. They first fought at Pride 1 so not sure why you think that Pride was the world's biggest org at their inaugral show. Anyway, Rickson fucked off to nowhere and never fought for Pride again. Pride went on to do another 28++ shows based off the loss, which was never avenged by anyone.
Masato's next fight after losing to Buakaw was with Kid, which got K-1's NYE largest numbers for 04. The beatdown didn't affect that and in any case, He didn't rematch Buakaw until 3 years later. There wasn't any guarantee that a rematch would happen or for a Masato win even if it did. K-1 Max lasted for about another 5 years since that loss until Masato's retirement in 09, so the loss didn't hurt their business either in the big picture.
No one's going to care even if Tenshin lost to May once he starts spin kicking people in the face again. In fact, he was expected to lose. With the right marketing, Rizin can keep him as a bankable main eventer.
Takada is the only exception to what I said, and I don't even know why you mention him, as he was always understood to be a celebrity sideshow with little legitimacy as an athlete, rather than a legit top competitor like Gomi, Masato or Saku.
As for Masato.. He might have gotten dominated in the championship fight, but his overall performance in the 2004 Final was still exceptional: beat Jadamba, beat Kraus and managed to go 4 rounds with a fire-breathing Buakaw. You can't sit there and pretend like that kind of performance is in any way comparable to the piss-poor showing Tenshin just had. As I've said before: not all losses are equal in the eyes of the Japanese fans. Putting up a good fight matters.
I also call bullshit on your claim that Masato's rematch with Buakaw 'wasn't guaranteed'. Masato was a legitimate top 4 talent in Max - that alone made it very unlikely that they would never fight again. Then there was the new clinch rule and the fact that K-1 put together the tourney brackets however they liked. ..And if all this failed, they could at any time arrange a superfight.
And again, Masato and Buakaw were both stars on the MAX roster, each making money for the company and boosting ratings simply by being in the same tourneys, creating anticipation for a possible big stakes rematch. How is this at all comparable to the merc job Floyd just pulled on Rizin?
I don't think that Tenshin is irreparably damaged by this loss to Floyd. He will still be Rizin's kickboxing star and people will tune in to his comeback fight and beyond. My issue is with people claiming that Rizin staged
this exact outcome because it was a more effective way to promote their star and themselves, than say:
Tenshin making it a soft spar for 1-2 rounds, then finally turning it up to see what happens.
or
Tenshin going easy for all 3 rounds, and actually managing to survive to a draw vs Floyd.
It's absolutely ridiculous.