I was wondering what would be the future of UA's fleet as 2013 saw the introduction of the 787-10, A350-1000, and the 777X. What aircraft do you guys think will be replaced in the current fleet and what aircraft do you think UA will order in the future?

My suggestions:
777-9X replace the 744
A350-1000 replace the 772
787-8/9/10 replace the 763/4
737 MAX 9 replace 739ER