Initial thoughts are of a nose down left bank entry into the water at speed, hence the LH sponson is torn off. Which is not that easy to do as that is some VERY strong structure. MR blades all hit the water fast and disintegrated, along with some of the MR Head by the look of it. Which is also not easy to do as it is Titanium and also VERY strong.
What is concerning is that it looks like the floats have been removed and the blanking covers have been installed. Need a clearer photo of under the baggage bay door but it does look like the floats are not there.
But why the entry into the water. Hopefully we get an initial report soon with an initial FDR readout.