The Alter Rebbe of the Lubavitch, R. Shneur Zalman of Liadi, is reported to have said, surprisingly, that Moshiach will be a Misnaged (not a Chassid), giving the following explanation.
If Moshiach will be a Chassid, the Litvaks (Misnagdim) won’t accept him. But if he will be a Misnaged, the Chassidim will accept him anyway, since Chassidim are (allegedly) ‘kabbolas ol’niks’ (בני קבלת עול).
See the rest (Hyehudi has dealt with this in the past, e.g., here).