The next EF lens from Canon will be the EF 85mm f/1.4L IS USM lens! This Canon EF 85mm f/1.4L IS USM lens is a highly anticipated lens for most Canon photographers and we expect it to come around sometime in Q2/early Q3 of 2017. In addition, The new Canon EF 85mm f/1.4L IS will NOT replace the current EF 85mm f/1.2L ($1,849).
For NAB 2017, Canon will announce some new products around April 20, 2017, but the detailed info are still unknown, the only confirmed thing is that Canon will release a new firmware update for Canon 5D mark IV to add the C-Log feature and some major improvements at NAB 2017 in April.
And there is no more info about Canon 6D Mark II, which is expected to be announced in late Q2 or early Q3 of 2017, probably in May/June.