The Kerr-Newman metric is a generalization of Kerr's metric of a rotating black hole, this time adding charge (Q) back into the equation. This was done my Ezra Newman in 1965, and the geometry is very similar to that of the Kerr metric.

The geometry is the same as the Kerr metric. The ring singularity allows access to the antiverse, and the remaining sections match the Kerr and Reissner-Nordstrom diagrams. The singularity will be slightly more repulsive since both the rotation and charge cause repulsive forces from the center of the black hole.

Plugging 0 as the values for charge (Q) or angular momentum (J) will reduce the equation to the Kerr or Reissner-Nordstrom metric respectively, and plugging both as 0 will reduce it back to the schwarzschild metric.