Re: 20th Century Fox upcoming Big Announcement
With First Class, Singer and Vaughn were brought on to spearhead a dying franchise in a fresh new direction.
Millar was then hired as a consultant to help expand the Fox/Marvel universe with X-Men and Fantastic Four. Their goal is to create a unified world.
Bryan is directing DoFP, bringing in many from the original trilogy and using the film as a way to "fix things" from other films in this franchise that may have taken a bad turn.
None of that spells reboot to me. At least not in the immediate future. Maybe in another 10 years...
At this point the closest we'll get to a reboot is whatever new timeline is created after the events of DoFP. That will likely be the free and fresh start the series will get. But that's still not a complete reboot as it will likely still carry the themes and characters (and actors!) Singer and Vaughn put into place.