Hmmm even if the FC cast is shown more, they'll be sharing their scenes with Hugh Jackman and Hugh Jackman is part of the OT cast and his mission in the 70s is connected to what is going on in the future period.
Plus the film will be showing scenes from the 70s and the future back and forth. So there's no way the OT cast and the new characters that are with them are just gonna end up like glorified cameos. A glorified cameo role is what Patrick/Ian got in The Wolverine and their role in DOFP is bigger than that.
The film might be showcasing more of the FC cast but the purpose of the film is to save the future where the OT cast belongs to. And the FC cast might be getting more screentime than the OT cast because its their last X-Men film.
As I've said over and over again...
On a note unrelated to the above quote, DoFP is a sequel. It begins in the future, and it's because of the state of said future that they decide to change the past, regardless if the majority of the film takes place in the past. The "past" portion of the film is a plot point which further's the main story; a new future. You can understandably consider it a sequel to FC, but overall, it is an absolute sequel to the original trilogy and TW.
The thing is, if this movie was really about the main cast, they didn't even HAVE to use the First Class cast, they could have just as effectively told the Days Of Future Past story without them. In fact, they probably could have more effectively told the story without the First Class cast, and it would have been cheaper for the studio.
The original story doesn't have time travel into the "past"... it has time travel into the "present". The original story has a future Kitty Pryde (or the cartoon using a future Bishop) to time travel back to the timeline's current "present", to change events leading up to an, at that point, unforeseen future.
The original story doesn't have anything to do with going back in time to before certain events in the existing timeline happened, and changing a timeline of things we already know. It has to do with changing the timeline of things that have yet to pass.
The movie could have had their apocalyptic future, sent someone back to the current "present", which would be after X-Men: The Last Stand and The Wolverine, to change an as of yet unforeseen incident from happening to prevent the apocalyptic future from happening.
The fact that the First Class cast is in this at all is proof that the focus in on First Class, and the main trilogy cast are just the sprinkles on top. Days Of Future Past came about from what was originally going to be First Class 2, but the ideas changed, Vaughn left, Singer took over, and it became Days Of Future Past. This is obviously a First Class sequel, with the main trilogy sprinkles on top, and any future of the franchise will revolve around the First Class cast, who is still under contract, and not the main trilogy cast who is not all under contract.
It's not a subway and infact I don't believe it's in the US. I believe it is part of the temple. You see them walking through the pillars to a tunnel which would fit the underground clips with Bishop and Sunspot. And in those clips you see what looks like Asian/Middle Eastern lattace work on the entrance. That isn't a subway. The windows aren't a subway either. Rogue is looking down from a balcony at Iceman/Kitty and they are in the background of the scene. It looks like an arched design on the balcony so it's not the mansion or underground as neither fit.
As for sequels, I am baffled why some posters are determined to believe the OT cast will not be getting used again when that completely contradicts the impression that the producers, Singer and the cast are giving. They have plainly said OT storyline possibilities are being considered and Anna etc have implied they would be happy to come back and talked about what they'd like in sequels. If this really was the OT bow out then none of that would have happened. DOFP is quite obviously not planned as their exit. Sequels may not materialize but they are a definite consideration going on from everything said. As for the FC cast I wouldn't say they are that "hot" right now other than Jennifer. The others aren't especially well known outside X-Men fans. Fassbender and McAvoy are not A listers.
They are not going to continue to make main trilogy sequels if this film effectively erases the main trilogy by going back and making "changes" that make the events of the main trilogy no longer happen.
If what people want, like Cyclops and Jean coming back, actually happen, then there won't be any more main trilogy sequels building off of a continuity that has been disregarded and erased.