Well, I'm guessing that you can't open the messages as no such message exists. Even if the messages do arrive, they will, in that moment of time, arrive in present and you'll read them in present. So technically, NO! You can't read messages that will arrive in the future.
What you can see is the number of messages that are gonna come in future.
Good luck reading them. Of course in near present.
PS : Please inform what's in the message.