  We revisit here a recent work on regular rotating black holes. We introduce a
new mass function generalizing the commonly used Bardeen and Hayward mass
functions and extend the recently proposed solutions in order to accommodate a
cosmological constant $\Lambda$. We discuss some aspects of the causal
structure (horizons) and the ergospheres of the new proposed solutions. We also
show that, in contrast with the spherically symmetrical case, the black hole
rotation will unavoidably lead to the violation of the weak energy condition
for any physically reasonable choice of the mass function, reinforcing the idea
the description of the interior region of a Kerr black hole is much more
challenging than in the Schwarzschild case.
