Will Haise regain his memories and adopt to his true personality as Kaneki again? Will Haise become Kaneki again? By that, I mean if Haise will regain his memories and adopt his true personality as Kaneki? 

I have a little bit knowledge of Haise's backstory (how Kaneki became amnesiac) but I haven't watched season 3 or read the manga (both Tokyo Ghoul and Tokyo Ghoul:re) yet. 

Did this event occur in the anime or in the manga yet?
If I skimmed the manga and read the wiki properly, and if the writers and such follow it,


   I believe he will return soon, because he will continue to develop and adopt the title of One-Eyed King. After a bout with Arima and Eto. Then starts his own group called "Goat."