http://www.techradar.com/news/halo-6-release-date-trailer-and-news

Halo has long been Microsoft’s killer IP, and one of those franchises that acts as an incentive for people to upgrade their existing Xbox console. The series has had its ups and downs over the years, especially with Halo 5 proving to be a major disappointment for anyone who has a stake in the single-player campaign. Halo 6 will hopefully be a return to form, and remind people why Halo has been so highly regarded in the past.

[Update: Anyone that was hoping against hope that 2018 might be the year they get to play Halo 6 probably shouldn't hope too hard. In a recent blog post, 343 Industries said that while 2018 is bringing "the promise of new fun times to be had and adventures to be embarked upon", it won't be "those adventures."