Rumour has it at QF:
All 380s grounded
All 747s grounded, probably permanently
90% of A330s (meaning about 3 aircraft left, this is probably to keep the pilots current and trained on the aircraft type for it's re-entry into service when demand comes back)
Nothing about the 787, but I'd assume it will maintain a skeleton operation to Asia, the UK and London. Despite travel quarantines there will be some people who need to travel, but not a lot.
All JQ international flying stopped. So no JQ 787s
QF is in a relatively strong position.
Staff costs represent 28% of its cost base. It remains to be seen what it can do to tackle staff costs.
Almost certainly staff of affected aircraft will be forced into a leave of absence without pay. There are some provisions to do so, but will probably require union approval. It's likely a lot of senior pilots flying the 380 and the 747 especially will not come back and may have, without them knowing, flown their last commercial flight.