To chime in on a few things discussed here lately, first all I think Ben’s force ghost is required at the end. I liked the idea of one planet from each trilogy, but the addition of Corellia would be cool since it represents the SW Stories films. However, I am more than willing to have Naboo added even if it messes with the symmetry of one film per “series”.
One last thing I would like to add, it perhaps we could have some variety of ships destroyed over the planets. Presenting four star destroyers in a row falling seems a little plain jane to me. Perhaps someone could add a dreadnought or tie fighters or even resistance ships, maybe even the new starhawk.