It didn't look good. Cornella had to be helped off the floor, guys on either side helping, dragging the injured leg. I've seen miracles before, but I wouldn't bet anything that he makes it to KC. He's still in the brackets (annoyingly on Track, not Flo).
Not sure about Foca. Maybe he could have continued in his final bout, but why risk it when he had a qualifying spot locked up and could only score one team point when the team title was already decided. He didn't look much different from Hines, who injured a shoulder in the semis and looked to be in a lot of pain but managed to continue and completed the tournament; different situation, he didn't have a qualifying spot assured.