So you equally know shit.
Luffy's dream may be retconned a thousand times a thousand. The main message of the manga remains: help the helpless, dethrone the tyrants. Freedom for yourself and others. This, coupled with the world party which is in line with Luffy's personality, means that guiding the destitute in the Final War against the biggest of tyrants (the WG, and therefore Imu) is still the most plausible course of action. What Luffy needs for the endgame is the PK title to guide people and the allies he's been making since the beginning of the series. Mihawk can be an ally. Mihawk can help make Zoro stronger. But in no way, as things stand now, is Mihawk a deuteragonist in the endgame. If there's ever going to be one, given her foreshadowed importance, that is Nami. At most you can consider the entire SHs crew one of the deuteragonists, having in Luffy the other half. The Revs come third, be it in the figure of Dragon or Sabo. Mihawks is a worldbuilding pillar, an actor in this final saga. Not a main character: which is what I was responding to.
So stop acting all mighty with half-assed comments and next time simply avoid replying to me.