In the movie Troy, there was a very cool (though ultimately manipulative) moment: A video shot of a beach with a voice over saying that a battle happened here more than 3 thousand years ago and that we are still talking about it (it's manipulative because the location of the city is unclear, in fact the war and the city itself may very well be legends). In the case of Pompeii though, the city is very real, the eruption documented and some corpses still in plain sight, so they could create a narration that is concluded by documentary footage of Pompeii today. That could be pretty good.
Sadly, the subject matter can also be used to make some abominable "divine punishment" drivel, so all bets are off. One thing is certain though, Emily Browning is always a plus.