They re did the beginning because they didn't have the rights to the first movie for whatever reason if you ignore that every thing else makes sense...
"But... But I want to be a big karate cyborg... ;_;" - Nik Hasta "Get off my lawn! ...on this forum, that just makes people think of Cyclops." - Sharpandpointies "...makes me think the Night King just says "Screw the rules, I have magic money" when it comes to physics." -Captain Morgan