From the filming it seems like the basic canon still is there, so we will see if this film is a Puzzle in Lion clothing.

Also the whole potential technological angle for Charn is not unreasonable, because the Deplorable War has always seemed to be a nod to the Atomic Bomb or weapons of mass destruction.

It could be pathing the way to show the difference between magic from technology and actual magic done by Aslan

Then there is Uncle Andrew himself, who is in the book portrayed as a foolish man of mostly fake tricks. But, there is the chance he could be portrayed as a man who secretly did not support the Allies in WW2, thus lending him reasoning to support Jadis in the first place

Jadis has always been represented as an evil dictator, and placing her is Post-WW2 England, with her having used the Deplorable Word, which is essentially the Atomic Bomb of Charn could be a way of linking the parallels in a manner that is left to just interpretation in the books