It will be complete in two weeks.
The finished product will be ready and available after two weeks have passed.
It will be completed in two weeks.
The finished product will be ready and available after two weeks have passed.
OR
The product will be worked on during a period of two weeks, making it
finished, ready, and available at the end of the two-week period.
In the first case, you are allowing for the possibility that work on
the product may not start until 10, 11, maybe 12 days after you utter
the statement.
In the second case, you may be saying the same thing as in the first
case, OR, you may be saying that work on the product will be carried on
during the entire two-week period.
CJ