Why all doom and gloom?
V Oz will have budgeted an initial loss.
Delta likewise, except we know they have a bigger (US Domestic) problem.
Historically, QF has confronted two US carriers on a number of occasions. The route goes into a loss for everyone, and one US carrier goes away.
This time we two Aussies against two Yanks. Betcha they indulge in some (legal) collusion.
The high seat factors (and profitability) in recent times also suggest that new entrants will grow the market.
Pity about the GFC