Earlier this fall, the Fortinet training and certification team released the NSE 6 FortiMail 5.3.8 and FortiWeb 5.6.0 exams. These exams now have 30 questions, increased from 15, which was the former standard.
Looking forward to early 2018, expect to see new FortiDDoS and FortiWLC courses and exams. More changes will follow throughout 2018.
In NSE 5 they have planing to add FortiSIEM as well in 2018.