You don't need to wait for an investigation to realise that something was obviously seriously wrong before that aircraft even started its take-off run.
Even if an engine failed, it should have been possible to continue and get safely airborne from the runway. This aircraft still had its MLG on the ground as it reached the perimeter fence.
Clearly the performance calculations were wrong: either incorrect data, or incorrect loading, or serious overloading, or not even calculated at all?