NHL can hop off, he's already been suspended for an entire year and left the country. They're gonna suspend him another season? Absurd.
He never actually received his supplemental discipline. They said as much when the ruling came down. He left the country voluntarily before he could be deported. He'd have to 1, petition to come back to the US. 2, petition to return to play for the NHL. 3, serve whatever additional supplemental discipline they had planned for him, which from what I understand would be lengthy.
In other words...he's not coming back.
And even if he did actually come back, the Kings would not be willing to deal with the PR nightmare of sending him back on the ice as a convicted spousal abuser.