Propaganda is my fear here, too. I'd love a rollicking adventure set in Roman times, but I wonder why Hollywood got the idea now, not just one studio but two. I'm afraid this could be another tiresome Hollywood political morality play, with the Romans standing in for Americans, being swallowed up by the Scottish "quagmire."
As for the fate of the Ninth, it seems odd that it would simply disappear from the rolls of the Legions, which suggests a catastrophe or disgrace. But where? Scotland or elsewhere? Several suggest it might have happened in Palestine, although I don't recall any Roman disasters there during the Rebellion. In an era of resurgent Scottish nationalism I can see why many like the idea of a catastrophe happening there. :-))
Well, we may never know. But I’m sure the historical record from that period is anything but complete.