https://www.erepubli...o--2732832/1/20
Here is original article that discuss this in depth. Too summarize instead of a finish line like we know have that awards the battle hero.
Players who are in front in a battle in any stage will get determination points . the person with the most determination points at the end of the battle will win the battle hero. this will require more activity throughout the battle and will add much strategy ( see article for strategy points) to win battle heroes.