To answer the question, there is no need to quote the speeches ‘innocently’ noting that Mashiach’s name is Menachem, or referring to his synagogue as a model of the Beis Hamikdash (!), and various other ‘hints’. The matter can be clarified through an oral tradition of a conversation with ‘Rabbi Moshe Breslover’…
Rabbi Moshe was once asked about the numerous times Rabbi Nachman of Breslov refers to the one, True Tzaddik. To whom does this refer? The rabbi answered wth a question, of course. When Yosef interpreted Pharoah’s dreams, he ends “and now you must find a wise and discerning second-in-command” And what is Pharoah’s response? “And Pharoah said to to his servants: is there another man so Divinely inspired as he?!” Now you tell me: how did Pharoah know whom Yosef meant…?
— What was obvious to even Pharaoh should be obvious to you too.
End of conversation. Now, the Lubavitcher Rebbe spoke quite a lot about Mashiach. That suffices.