No Vengeance required
In the original, I understood why Kurt avenged his brother and fought Tong Po. Eric was clearly not aware of the style of fighting he got himself into (Kurt even mentioned that in his corner) and Tong Po ignored the rules of the match to purposely cripple Eric. Not to mention, Tong Po was a mad man and needed to be stopped.
In this film, Tong Po paid Eric, flew him out there, got him a great trainer, and Eric was fully aware the underground fight was dangerous. Then when Kurt tries to assassinate Tong Po, rather than kill him as the original would surely have done, he pays for Kurt to fly home. Honestly, I don't think Tong Po was the bad guy here.