Hi Paksen, and welcome to the forum
As others have said, there is nothing new in jw land as regards 607.
The problem is that the watchtower prefers to ignore the overwhelming
archaelogical and historical evidence that shows that Jerusalem was
destroyed in 586/587 BC and cling on to 607 as it fits in with their
calculations regarding 1914. If they changed 607, they'd have to change
a whole lot more than they could get away with without losing some
members, so I guess they'll stick to 607 for now.