They can call the book by a different name, "The new adventures of Willy Wonka and the Chocolate Factory" or something of the sort or even add a prominent "updated for modern readers" subtitle so as to avoid any confusion.

The problem I have isn't with somebody being able to edit or remix an old work, I think it's fantastic to do such a thing. It's that after this comes out it's going to be virtually impossible to find the old edition available for purchase, and only the re-write will be available. It's that the new intellectual property owners are replacing a classic book with their own in effect and what gives them the right to do this? Apparently just being rich.