Actually, DFW-LGW gets both a 777 and an MD-11 as well as a 763. DFW-FRA gets an MD-11 as well. DFW-NRT has been serviced by a 777 for well over a year now.
"Bangkok Tower, United 890 Heavy. Bangkok Tower, United 890 Heavy.....Okay, fine, we'll just turn 190 and Visual Our Way