Paramount Pictures has set the release dates for the next three movies. Source: http://www.thewrap.com/paramount-set...ormers-movies/

Transformers 5: 23rd of June, 2017

Bumblebee spin-off: 8th of June, 2018
Source: http://www.comingsoon.net/movies/new...-film#/slide/1

Transformers 6: 28th of June, 2019

The 2018 movie is being reported by most movie news sites as Transformers 6, but it's actually been reported as a Bumblebee spin-off by ComingSoon.net.