Deadpool & Wolverine's release date is what?
Sadly, the given material lacks a release date for "Deadpool & Wolverine." It says just that the trailer is the last one before the film opens. We cannot thus address your question. For the confirmed release date, Marvel Studios' official announcements are best watched for.
Are Deadpool & Wolverine official Marvel Cinematic Universe (MCU) films?
Once more, the book just states "the MCU movie," suggesting that Deadpool & Wolverine is in fact part of the Marvel Cinematic Universe. This material, however, comes just from the book, thus it's advisable to wait for official Marvel Studios confirmation for a clear response.
What might the film have in store?
The book just notes a last trailer, thus we have no idea about the story or particular events to feature in the film. To have a clear sense of the content of the film, you will have to search official sources or Marvel Studios for more thorough material.
Deadpool & Wolverine has what tone?
Though the book doesn't say the tone, "Deadpool" is well-known for its fourth-wall breaking moments and sarcastic humor. Given that the film centers on Wolverine, we might guess its R-rated, action-packed theme will be intense. To have a confirmed knowledge of the general tone and style of the movie, it is always advisable to wait for official sources though.
In this film will Ryan Reynolds portray Deadpool?
Although Ryan Reynolds isn't specifically mentioned in the book, given his past performance of Deadpool in the solo films, he most certainly will return in this movie. To be absolutely sure, though, official confirmation from Marvel Studios or the movie's cast would be required.
Will Hugh Jackman star as Wolverine in this film?
Although Hugh Jackman isn't mentioned in the book specifically, his legendary performance of Wolverine is well-known. Given his earlier comment on leaving the position, he seems unlikely to show up in the film. To validate this conjecture, though, official Marvel Studios or cast material is required.