The cast has been revealed for The Challenge: World Championship, and there are several promising contenders. The crossover season will feature competitors from a variety of global spin-offs of The Challenge, bringing together players from America, Australia, Argentina, and the UK. The global competition has been teased for quite a while now, and it was discussed often on CBS's The Challenge: USA as a prize for those who succeeded. Although The Challenge has brought several international players on before, this is the first season where multiple countries will have players representing them in the head-to-head battle.

https://screenrant.com/the-challenge-world-championship-most-promising-competitors-explained/