We have heaps of info now from the pre-production period, the toy characters being revealed, promotional material (images and marketing catch-phrases), and trailers... if you want to speculate or predict what will happen in TF5 - The Last Knight, this is the topic to do it.

Just beware of spoilers if you are reading this topic, as anything goes.

Then when the movie comes out, we can see how close the predictions of fans were.