Assuming it is announced before then, the next GI has a 1/4 chance of announcing it. The one after that has a 1/3 chance, then 1/2, and then the next after that has a 1/1 or 100% probability. I think. Numbers aren't my forte'.
I like numbers, and this is using the issue dates only. And I saw the update about the twitter update, I just have a point to make.
1/4 -> 25% chance of an announcement in month 1
3/4 * 1/3 -> 25% chance of an announcement in month 2
3/4 * 2/3 * 1/2 -> 25% chance of an announcement in month 3
3/4 * 2/3 * 1/2* *1/1 -> 25% chance of an announcement in month 4
Math just said only time will tell.