I would expect they would get a new host. Yvette Nicole Brown would be a good choice. Aisha Tyler currently hosts a Dietland aftershow, so she could be in the running as well. Kevin Smith is another possibility. Or they could have a different host each week.
My opinion is that AMC or anyone for that matter should give a person the right to be considered innocent until real proof shows otherwise. There seems to be a vendetta against Hardwick by this woman but right now the rush to judgement doesn't sit well for me. There have been major celebrity and government figures that have been exposed and they are going to face the consequences though it will never be enough to return the victims peace of mind. If Hardwick is really responsible for doing what is claimed then sure go ahead and fire him but AMC should have given him at least the benefit of the doubt until something more substantial is shown. Now of course since I dare show my opinion it will only be a matter of time until something does come to light making me look like a dumb ass but the principle would still be relevant.