That's because Hollywood (specifically the Writer's Guild) hasn't written an original movie in years. When I say years, I mean a decade. After a while, people started catching on that they were remaking every old movie they could get their hands on and either: a) turned into into a film when it used to be a musical (watch TCM, its so obvious), b) blatantly retitled it and made minor variations to modernize it, c) incorporated CG instead of old school SFX

So they decided to nab any and every foreign film they could get the rights to, and redo those. No one would notice because most Americans don't see foreign films. I can think of about 3 right now that are being Americanized as I type this.

When the Writer's Guild went on strike several years back, Hollywood should have just let them go.

Will Battle Royale: America be worse than Battle Royale 2? That's still up in the air. It's hard to beat a movie where the antagonist eats 50 Pepcid AC tablets every 10 minutes.