Nostalgia or not, DL is committed to growing its west coast presence including the SFO market. Based on currently published schedules and even considering the cancellation of the NRT flight, DL's capacity at SFO will be up 5% by next summer based on increased capacity to LAX, JFK, and SEA. AA's capacity is down more than 10% based on reduced capacity to JFK and ORD, again based on currently published schedules. VX's capacity is down as well in several key markets including LAX, SEA, and BOS (which might give some clue as to why DL decided to add capacity at SFO).
Based on currently available schedules, DL will be the #2 carrier at SFO regardless of whether AA and US merge and with about 10% more seats than VX.