Hezbollah did not disarm, and they still have their weaponry buried in Southern Lebanon, so sure, there will be more war, and if Israel has good sense, they will prepare for it.
Hizbollah is positioned for an attack from the south. Israel should put an attacking force on the south of the Litani River (no-one comes in and no-one leaves), leave part of the army there and then attack south crushing everything as they move south. Any Hizbollah who want to retreat or need medical attention will have to get it in Israel by moving south, not north.