Seems Ubisoft has 4 AAA's releasing next fiscal year:
-The Crew 2
-Skull & Bones
Bear in mind, that Ubisoft says they expect to sell 23m units next fiscal year.
-Assassin's Creed. Ubisoft has hinted that AC won't be returning to yearly releases, that they will instead focus on long term DLC plans for Origins instead.
-Far Cry. Far Cry 5 is releasing in March 2018, and Ubisoft has never indicated plans to turn Far Cry into a yearly franchise.
-Beyond Good and Evil 2. All signs point to Beyond Good and Evil 2 being in very early development, most likely releasing next gen.
-Splinter Cell. Yves Guillemot implied about a year ago that they were still taking concept pitches for the next Splinter Cell, so it's unlikely to be ready before Q1 2019.
-Rainbow Six. Ubisoft are happy with the long term playerbase for Rainbow Six Siege and are unlikely to harm that by releasing a new Rainbow Six game.
-Steep 2. Steep released in Q4 2016, unlikely they'd release a sequel by Q1 2019 though, a full 3 year gap is likely.
-South Park 3. South Park: The Fractured But Whole released in Q4 2017, unlikely they'd release a sequel by Q1 2019.
-Ghost Recon. Ghost Recon Wildlands released in March 2017, and while a sequel 2 years later isn't unheard of for Ubisoft, it is still unlikely given other possible options. Wildlands 1 took 5 years to develop afterall, and it was still rushed, MP functionality wasn't ready at release which hurt it's long term viability. I think they'll take their time on the next Ghost Recon.
-For Honor 2. For Honor released in Q1 2017, so a Q1 2019 release would give it about 2 years of development, which isn't unheard of for Ubisoft. However, the game still has a sizeable playerbase of 1m monthly active players, so I think they'll give For Honor 2 3 years of development instead of 2.
-Rayman, Just Dance, Rabbids, Trials. Ubisoft doesn't usually consider these franchises to be AAA.
-The Division 2. The Division was a big seller for Ubisoft, and Q1 2019 would give a sequel to The Division 3 years of development, which sounds just about right for a AAA game of it's scale. Further evidence is the fact that Ubisoft's DLC/update support for The Division 1 is planned to dwindle throughout it's 3rd year.
-Watch Dogs 3. A Q1 2019 release would give Watch Dogs 3 27 months of development, which is about the same amount of development that Watch Dogs 2 had. A sequel is likely, Watch Dogs 2 sold pretty well even though it was down compared to the first game, and Ubisoft updated Watch Dogs 2 after release, adding in an epilogue scene teasing London as the setting for Watch Dogs 3, which indicates that it sold well enough to warrant a 3rd game.