Well it's like 3 years time skip and after they work funerals for those who died, fix and damage done from the war, and work on the new policies for the new system then they might not even have the same ninja system for a Chunin exam. If they do then Naruto and Sasuke would have their higher powers restricted but they can win in base.
Also that's assuming Sasuke returns to the leaf, he might be wondering around by himself.