We saw this the other night. I hadn’t read anything about it, except an ad on the side of a bus! - and TBH was expecting something on the lines of that Daphne du Maurier adaptation, set in Venice.
How wrong can you be? It was extremely loosely based on an Agatha Christie novel, so there was Kenneth Branagh playing Poirot, with an American actress playing the should-be very British Christie character, Ariadne Oliver! Sacrilege!
There was a lot of spooky stuff going on in a very spooky old palazzo, but TBH it would be more suited to young teens at Halloween. To put it bluntly, we both found it daft and disappointing.