According to
this presentation (which contains some interesting data), it'd appear that AF/KL (with U.S. SkyTeam cohorts) is also eyeing SEA (see pg. 23). I wonder if it'll be an addition on a NW 332 service (a/c rotating through NRT/HNL/MSP) or AF 332 (additional a/c used on CDG-SEA-LHR).