Willd adds a lot of thoughtful comment with which I concur, however I do think we are going to see more carriers than the odd one or two: AF, Delta, NWA, Continental are all in the game albeit that only AF is truly new, the others propose to switch their flights from Gatwick or code share. We haven't heard yet from Lufthansa, and I think they'd be interesting. Then what about SIA going around the world, or Qantas, and I wouldn't rule out Emirates continuing some flights to New York?
It is BA currently that I see being in a lead position - they have new planes coming (in the near term extra 777s before the 787s and 380s), and as Willd says T5 won't handle their 757s so either they go to other terminals or Europe ... I think BA will take the risk and the lead because many other airlines don't have the ability. That means BA from continental Europe, so perhaps Madrid, Rome or even striking in France and Germany? Madrid I would think a plum one.
As for Virgin, I can't see where the aircraft are coming from to start up loads of new routes in 2008 or even 2009? The 346s have dried up, the 787s will be a while yet and the 380s deferred ... unless there's some quick buying on the used plane lot?
One factor that seems to be helping is London City Airport - flights there are fast expanding and for city workers it is more convenient than LHR, so the LHR slots can be freed to do transatlantic for those that have them.
As for the US carriers - I can see them expanding into London. They have a strong track record of shutting down unprofitable routes and opening up profitable ones. Their restriction is not planes but slots, and they have huge captive corporate customers to fill the high revenue seats.
As for prices ... well has anyone noticed a drop since Eos, Maxjet or Silverjet? Err no. So maybe it will be business as usual for VS with the bean counters determining perks!
There's a plane at JFK, to fly you back from far away
all those dark and frantic transatlantic miles