The study of Planetary Nebulae (PNe) in other galaxies offers a view into the late stages of stellar evolution in galactic environments that are considerably different compared to that of the Milky Way. For instance, the specific number of PNe is thought to depend on the stellar metallicity of their parent population at a given stellar age. Massive early-type galaxies provide a benchmark for studying PNe in a super-Solar metallicity regime for old stellar population, and in this respect, integral field spectroscopy offers a unique way to detect PNe against the bright stellar background their central regions. We use Fornax 3D Project MUSE to explore the PNe population of the brightest early-type galaxies within the Virial radius of the Fornax cluster. We also highlight the improvements that MUSE Adaptive Optics (AO) observations would provide for the detection of distant PNe. Such improvements could be applied to helping constrain a value for the Hubble constant (H0).