I agree with dly and Nij here - there isn't enough interest in pool to justify a separate site. I'd rather see an effort to drive people to this site than splitting the content across two sites.
That doesn't mean you can't propose it on Area 51, but my personal view is that it would be likely to fail.
[ For avoidance of doubt: the below are my personal views. They do not represent the views of the Sports SE moderators or anybody other than myself. ]
I'm not convinced we need a separate site for this. The biggest thing stopping Sports SE moving from beta into a public site is a lack of questions - I'd be more than happy to see the sort of questions being ...