Likely none of the above. My guess is they will release the frequencies back to the FCC.
Both PAWM and PAWMco have sufficient capacity for their needs, and aren't hitting congestion. Since the frequencies are at the same sites as PAWMco, the coverage for PAWM is not necessary. Also the equipment (microwave/repeaters/etc.) would all have to be replaced, at considerable expense (although I would think the new Microwave/fiber links for the P25 system would have the capacity, you're still talking repeaters and more, for capacity you may never need).
As far as Simplex Tactical, the
statewide Simplex plan is already out there, and adding additional local ones would be redundant.
Keep in mind, the 6 frequencies are licensed only for wideband (25KHz) use. The FCC will likely carve them up to 12 narrowband (12.5KHz) frequencies, thus expanding the availability for other users. If the County was going to repurpose them, they would have to apply to the FCC to change them to narrowband, and justify their continued use. Also, as Public Safety agencies transition over to 700MHz, many of them get the new frequencies on the condition of returning the 800MHz frequencies they're vacating.