The biggest announcement is that there will be an Ant-Man sequel called Ant-Man and the Wasp that will be coming out on the previously announced Black Panther release date of July 6, 2018. This is forcing Marvel to shuffle their other release dates.
First Black Panther will now be coming earlier. It's new Date is Febuary 16, 2018.
Captain Marvel will be coming March 8, 2019.
In addition they announced 3 phase 4 movies. May 1, 2020, July 10, 2020, and November 6, 2020.