I don't think this bodes well for the future. Both rats and bats have been huge vectors of diseases. This is going to produce some kind of super virus that will be another middle age plague like pandemic.
We haven't observed orcas predate moose or primates, but the former has plenty of supporting evidence and the latter has probably happened at some point.
In any case, zoonotic reservoirs likely slosh around a lot more than we think before spillover events.
Some native Arctic peoples have traditions of killer whales eating people, although officially they have only killed people while in captivity. A person in a skin kayak would be easy prey for one.
We got SOF rats before GTA6.