I'm really not sure about Ernesto Hoost's condition, I think he's still out, but I can't find an update. Even his website doesn't offer any info.
I would love to see that fight, and I would bet on Hoost. Tyson can prolly outpunch any K1 fighter, but he isn't trained to defend against kicks. Another thing is, Tyson is very lazy when it comes to training, even for boxing fights. Teaching him how to defend against a world class kickboxer like Hoost is not gonna happen. If such a fight was to happen, I'd say Hoost in 4 with a high kick KO. He'd keep Tyson at a distance for the first couple of rounds, just getting in those fast low kicks, and crushing his legs. By 4th round, Tyson would be unable to get in close range, and would start to experiance Hoost's high kicks. game over.
Here's the kicker tho. Hoost has been beaten by Sapp twice (1st round and 2nd round KOs), and Sapp has a much weaker punch then Tyson. However, his footwork is much better, and his size was a big factor in pushing Hoost into corners where he could devestate him. But, Hoost did win their last fight.
I guess we can only wait and hope they promote the fight../