How many copies of Madworld have to sell to get a sequel?

[puffy]

So how many copies do you think need to sell to make Sega tell Platinum Games to make another?

I actually have quite high expectations about how MadWorld can sell but how many do you think Sega wants?

How many will make Sega think that MadWorld should become a franchise?

My guess is that if it sells 1 Million, we can be assured of a sequel..