Impossible to know. Some argue that the ESRB MUST have seen the full roaster list, so this must be final. Some argue that as long as the ESRB sees the whole roster, the roster list itself need not be complete.
Perhaps the ESRB got a video of an evolving roster, and we only saw it near the end, but not the very end?
All we can do is speculate.
Can you show me why we know for certain the Palutena leak was fake? I know the model doesn't match what's in game 100%, but it's pretty close. The leak happened ages ago (one of the very first leaks), I feel like some model changes could have been done in that time.