I just checked the mayan calendar and it says there won't be any new chapters coming out any time soon.
The next chapter when will came out???? The next week or the Christmas week????
Obviously, the Mayans were wrong and there will be more Naruto.
I'd say a break in a couple of weeks, along with a couple of breaks, golden week, and then a christmas break next year. Kishimoto will use enough flashbacks (including the whole Rin thing, and the black Zetsu) to keep it going for at least a year...
Chapter 614 was a double issue, so we normally should have a week break.
But since we're on a holiday, the next issue, which is 6/7, will most likely ship early.
It's slated for a Friday 1/4 shelf date, meaning Chapter 615 (issue 6/7) could come anywhere between 12/24 to 1/2, the most probable being 26-27, a week before its shelf date ( considering also translators would probably like to enjoy Christmas ) .
Chapter 616 ( issue 8 ) should be the normal time, 1/15-16