When the Hollywood Majors see a chance to make money, they won't let it fly away, and what is the easiest way to do it? Do a remake: the story has already been written, it was already a success, risks are low, and profits are probably high, perfect!
If not for that feeling that every Hollywood remake is gonna be awful, why? Maybe just a prejudice?
By the way, cool, i just saw that there is the remake of The Karate Kid on the works. So cool, and I immediately went to watch the trailer:

What? The feeling that every remake is awful is not just a feeling?
So, they took The Karate Kid and removed:
    - The Karate (Replaced by Kung Fu)
 
    - Japan (The story is in China)
 
    - Miyagi sensei (With Jackie Chan as Mr. Han)
 
    - Daniel-san (With Will Smith's son that, dressed as a rapper is Dre - please note that Will Smith is also the movie producer)
 
Ok, the protagonist moves from a city to another, and is bullied, but it's a brand new movie! Why not choose "Kung Fu Kid"? 