There would be widespread unrest in the Middle East which would eventually spread to North Africa and Eastern Europe. America would then send troops to help deal with it and the unrest would be handled. However, a lone American troop by the name of Jack Hamilton would go crazy and attack the Chinese embassy in turkey, killing 23 Chinese civilians. China would then nuke Africa, Europe and the Middle East and America would retaliate and nuke china...etc. etc. There'd be a worldwide nuclear holocaust and no plant would grow on earth for 100 years and all life would be destroyed.
Don't do it Microsoft! For the love of god don't do it!
My prediction threads:
Wii U will sell under 40m units (made on 14th September 2012)
PS Vita will sell under 20m units (made on 30th September 2012)
Wii U will sell under 7m in 2013 - I was right