Assuming rod bolts failed, rod hit cam, broke cam, cam piece was pushed back (rear cam plug is gone, rear bearing mangled, plus the flexplate damage), flexplate hitting the cam piece was forced back into the engine contacting the other rods (there is at least 2 in the pan, shattered piston pieces as well) and it all went to hell from there.
At what rpm? Are you expecting better results from the new engine?