I will say BJJ, MMA, and Wushu. Maybe Aikido or Sumo too.
4 fukking countries playing baseball?mma & baseball
I don't know what hand-to-hand combat martial arts are already in besides boxing, judo, taekwondo, and wrestling... but...
1. Kickboxing.... by a mile
2. Karate
3. Baseball (but if we're just talking martial arts then...)
3. BJJ or Jujitsu, whichever is more popular
4 fukking countries playing baseball?
Cricket would be favored more.