Rian Johnson definitely says that Benicio Del Toro is NOT Ezra Bridger in Episode VIII:
http://comicbook.com/starwars/2017/0...r-wars-rebels/
Director Rian Johnson was asked point blank if Benicio del Toro's new character nicknamed "DJ" is actually Ezra or if they have any connection.
“He’s his own person,” Johnson answered on Good Morning America. “DJ is his own person.”
Johnson also stressed that “DJ” is what the character is called in the movie and that it stands for something, hinting that it would be a big reveal when
Star Wars: The Last Jedi hits theaters.
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Dark Jedi?