Chalenge mode

look at chinese version so epic chalenge mode 20-30 waves of mutants , zombies , humans with gun sniper , and at end or round boss, 50k points = 1 box you can get a mp 5 +10 7day then there is silver box plantium , gold , has some permanent items....this would be good when will this come ?
link:
http://www.youtube.com/watch?v=ms1iBLAHLrQ&feature=related
BTW i sugest you turn of the sound this music is terible