I think it's a good assumption Apple will release all their new products before earnings. So, if earnings is 10/27, then an event 10/24 is out of the question because it's too close (also, its a Monday).
We could have one 10/4, but that's highly doubtful given we've passed the invite range.
More likely is 10/12 (a Wednesday because of Columbus Day holiday in the US), or 10/18. If 10/18, and if it follows iPhone pre-order dates, we would have pre-orders on 10/21 for release on 10/28... one day after the earnings event.
So I'm putting my money on a 10/12 event. I know it's a lot of assumptions, but that's my guess and I'll stick to it until next week when/if it's proven wrong.