Kai already gave us some of the replacements: Mr.Satan was voiced by Unshou Ishizuka and Tenshihan by Hikaru Midorikawa barring incidents I don't think they would change that.
Also let's not forget Dende will be voiced by Aya Hirano.
A part of me would have preferred a Kai buu saga announcement, but I'm not going to complain about a movie especially with Toriyama involved.