Sure, everyone hopes their leader is Moshiach!
HE IS ALREADY DEAD. That's like lehavdil hoping for a dead guy to be major league baseball's most valuable player. Only live baseball players can be the MVP. Babe ruth can't win this year's MVP so stop "hoping" for that.
I also don't understand if a messiah is coming, and no matter who he is he will do x y z, why does someone hope that his personal rebbe is that messiah? It makes no difference. It could be an albino from Seskatchewan, as long as he does what the messiah is supposed to do what bearing does it have whether it was a lubavitcher rebbe, a munkatch rebbe, or any other kind of rebbe?
This is like saying, I hope my great great grandfather was the moshiach (even though he's already dead and clearly wasn't the moshiach, but maybe in some parallel universe he really was). First, why does it have to be your great grandfather? Ego? Some kind of pride thing? Secondly, how can someone who already lived a life that proved he was not messiah then died, ACTUALLY BE the messiah? Just lunacy. This is the talk of crazy people. And you think it's fine based on whatever belief system you subscribe to, so you are in effect perpetuating craziness among Jews. I urge you not to do that. And that is why I contradict your inaccurate statements.
Sure, everyone hopes their leader is Moshiach!
No, they don't. I don't know where you got this idea from. This sounds like you are describing a personality cult. Or maybe a real cult with kool aid and everything.
And we don't know truly how G-d has things planned out.
Who claimed to know how God planned things out?
I think the messiah has been here multiple times, and he will tell us who he was when he finally comes...
You are free to make up any belief you want, but Jews are supposed to follow Judaism, not made up beliefs. Judaism has parameters.