@rezazo Great question! Our product team sees using Multipage and Multiplayer together in the editor as the ideal future state. When Multipage becomes generally available (versus currently in Beta), Multiplayer will be supported.
Keep your eyes out for changes on our Multipage Changelog in our Announcements section!
Also, I'll be sharing the final roundup of recognition for participation in this Challange soon, stay tuned on this thread 