When it will come out ??
On release day, and all the week after that, the update is available for $20.
One week later, on the same calendar day as the release day, it's available for $10.
Another week later, on the same calendar day as the release date, it is available for $5.
The minimum price for an upgrade, is $5. Until a new update is released and the previous update is available to the public.