The Olympics are about to begin.
It will be interesting to see how things turn out.
Here is our idiom for today; back to the drawing board.
This means to start something again from the beginning because things are not working out like you thought.
Example 1
We have to go back to the drawing board because our ideas on how to solve the problem, failed.
Example 2
The inventors of the airplane had to go back to the drawing board on many occasions because their designs failed many times.
Example 3
We've looked at every possible angle and every time we get the same results. I guess it's time to head back to the drawing board.