I feel that since the original X-Men franchise started with Wolverine and Rogue as lead characters, it should end that way with Rogue taking care of Laura at Eden. And this would also be a great place to introduce Gambit.
Rogue surviving makes sense since Logan saved her before via giving her his powers like in X1. Hell, have her permanently keep Logan's healing factor like with Carol Danvers so you wouldn't have to make Anna Paquin look older.
This would of course mirror X-Men: Legacy where Rogue mentored young Mutants at Utopia, which was similar to Eden. Eden is probably a cover name for Utopia. "X-Men: Legacy" can also have the double meaning of Laura taking up the legacy of The Wolverine.