Looks like Lorenzo is either trying to talk down doing a live action Beast Wars movie, or trying to talk up financial support for it, by estimating that it would cost about US$450 million to make... and that's even before marketing (which would be at least another $200 million), which would need to make well over a billion dollars before it even starts making money. It would actually need to make more than any of the previous Transformers movies to be considered profitable, and with the box office takings going down since the peak of TF3 (at $1.12 billion), it would be difficult to expect that a new movie could reach that, and even more difficult to convince investors that they could reach it (particularly with the Bumblebee movie making less than half a billion).