Mexico's President was one of those leaders who initially didn't take Coronavirus that seriously. If I recall they were a bit late closing their borders.
Davila (and hopefully his family) would presumably fly back to NZ via the US. That border is currently closed to all but essential travel.
No idea if the Auckland-LA flight route is still open.
Don't see Hooper returning to the Nix.
If the 2019/20 season is completed it will be in an Aussie - Western Sydney was the most recent touted plan. So it's more a case of the Nix NZ contingent being allowed into Aussie (aka Warriors), rather than the Nix players now in Oz (was it four?) crossing back over the ditch.