Good publicity for Floyd, he can compare this to Muhammad Ali fighting pro wrestler Antonio Inoki. Anytime you can compare yourself with Muhammad Ali, its a good thing.
The second good thing about this is even if Floyd loses, he'll remain undefeated in boxing and his legacy will be intact.
Gokhan Saki fighting in the UFC might have showed kickboxers are a bit overrated. People give them too much credit due to their success against boxers like Ray Mercer--who probably didn't even bother training for those crossover matches.
I've never seen Tenshin fight, Floyd isn't known for having 1 shot KO power it could be hard for him if it goes to the scorecards it can be much easier to land a kick to the legs or body than a punch to the head. The kickboxer has the range advantage and Floyd's tight defense and shoulder rolls won't necessarily be as effective against kicks bludgeoning his cranium.
Floyd will have to bring in some kickboxers to spar with & figure out what his chances are.