Romulus is made for new audiences and I think only missing context is the goo/engineer lore. The next movie in this reboot series could explain that without people having to go back and watch Prometheus. If people go in blind they won’t notice all the scenes and dialogue that are copied from the original.

The sci-fi/alien/space action thriller is the main selling point and if a person is already into that they may as well watch all of them. If they are already lukewarm on the concept then I wouldn’t drag them through the whole series. There are better movies to watch.