Hey there, I was just on Amazon.jp and noticed the 6D kit is now available for pre-order. see price list below (the USD prices are just a straight conversion to make it easier to see the difference and is not the price of the kit in the US) -
6D body only = ¥178,201 ($2,242)
6D + 24-70 f/4 IS = ¥328,997 ($4,139)
The 24-70 f/4 IS on it's own is ¥146,526 ($1,843) pre-order so the discount there is non-existent! In fact at the moment it's cheaper to buy them separately!
For comparison the 6D + 24-105 kit = ¥268,200 ($3,375)
And also the 5D mk II + 25-105 kit = ¥224,341 ($2,823)