  We consider two high symmetry stackings AA and AB and examine the changes
induced in the electronic structure by considering small angles of rotation of
3.48degrees from both these stackings. In both cases we largely recover the low
energy electronic structure of the untwisted limit. We additionally find flat
bands emerging above the dispersing bands. Surprisingly, while the rotation
from the AA end leads to one flat band above the highest occupied band at
{\Gamma}, one finds two flat bands emerging for small rotations from the AB
end. Examining the real space localization of the flat bands allows us to
discuss the origin of the flat bands in terms of quantum well states and
qualitatively understand the dependence of the number of flat bands found on
the twist angle.
