  Recent advances in twistronics of low-dimensional materials, such as bilayer
graphene and transition-metal dichalcogenides, have enabled a plethora of
unusual phenomena associated with moir\'e physics. However, several of these
effects require demanding manipulation of superlattices at the atomic scale,
such as the careful control of rotation angle between two closely spaced atomic
lattices. Here, we study moir\'e hyperbolic plasmons in pairs of hyperbolic
metasurfaces (HMTSs), unveiling analogous phenomena at the mesoscopic scale.
HMTSs are known to support confined surface waves collimated towards specific
directions determined by the metasurface dispersion. By rotating two
evanescently coupled HMTSs with respect to one another, we unveil rich
dispersion engineering, topological transitions at magic angles, broadband
field canalization, and plasmon spin-Hall phenomena. These findings open
remarkable opportunities to advance metasurface optics, enriching it with
moir\'e physics and twistronic concepts.
