so sad when they doesn't announce diablo 4 during blizzcon 2018, but there some leak information by a diablo 3 youtube content creator rhykker and from kotaku.com after the blizzcon
even more sad after people reveal they cancel a upcoming expansion after reaper of soul.

source
https://www.youtube.com/watch?v=HHXMkZkjDSA
https://kotaku.com/the-past-present-and-fut...ablo-1830593195

but back to Diablo Immortal it seem they simplify it alot, skill become lesser and lesser active skill from D2 can bind F1 until F12, D3 6 active skill 4 passive and Immortal 5 active skill not sure about passive.
another thing is Mana/Fury/Spirit seem gone all change to Cooldown base


source
https://www.youtube.com/watch?v=MpCIMJmqPhY (Monk)
https://www.youtube.com/watch?v=bkO26-LRXY4 (Barbarian)
https://www.youtube.com/watch?v=yqtd2weekwQ (Wizard)