Do we think that VA will use COVID-19 as an excuse to pull international completely? With QF's substantial reductions to US, surely VA's 18 services must be facing difficulties too?
VA have already planned USA cutbacks between April and October due to C-check Heavy Maintenance on the 777s.
As per posted above, perhaps more can be brought forward.
VA 777 Heavy Maintenance (LAX cutbacks) Source: Virgin Australia to temporarily reduce LAX flights in mid-2020
As for pulling International entirely, as stated, that would likely require a "takeover" of VA by either an existing shareholder, or an outsider, none of those scenarios will not likely be happening for the foreseeable future. The majority of the existing VA shareholders has financial difficulties or other difficult priorities (in SQ's case) of their own to make a bid.