I have some good info for u:
the 777 will be replacing the A330 in some routes, and Emirates is expecting to fly USA and Brazil, maybe Argentina...so could be doing this with the 777 also.
From 2009 to 2015 they will be receiving lots of 773 because they want to increase the average aircraft size, and this info proves my point of view, that they will problably use those for the ultra long flts.
In the future they are looking for Toronto,Wash.,NY,LAX
and maybe more...
Great place to work!
Best regards from Brazil!