Why would the WWE put 12 divas on SVR 10 ?

So I just saw the divas that are going to be on SVR10 they are the y Melina, Bella Twins, Beth, Eve, Gail Kim, Kelly Kelly, Michelle Mccool, Natalya, Maryse, Maria, Mickie James and there are more divas in the WWE than that I was just wondering why couldn't they just put all the divas on there and there was supposed to be 3 legend divas which were Trish, Santina, and I think Lita so I just wanted to know why couldn't they just put all of them on there were they being grimy or something.