They actually have two versions planned for the theaters: regular silent watching and the "quote along" version which will include subtitles.
"In this new Quote-A-long rendition, fans not only witness the absurdity of Arthurian legend but also actively participate in the laughter. It’s a sidesplitting cinematic event that honors the timeless humor of Monty Python while inviting fans to quote, laugh, and sing-a-long like never before. Get ready to journey into a world of Medieval madness, coconut-clacking horses, and unforgettable one-liners in this uproarious Quote-A-long version of a comedy classic."
Shouting out all the lines is optional.