An idea sequel that combines the a bit from Star Fox 2, Adventures (mostly), and Assault
A Star Fox game where Sauria is back, but is ruled over by Andross and the real villian, General Scales, who sides with Andross a majority of the game before he betrays him and being the one to conquer the Lylat System. Krystal will be introduced from her home planet Cerinia to save the Dino citizens, but fails and gets captured and the rest barely made it out and need of a bigger team. Time as passed since Krystal was captured and the army of apes and reptiles have taken over planets, causing General Pepper to contact the new Star Fox team: The 4 main characters and 2 new characters: Miyu and Fey.
Now you have a Star Fox 2 mechanic where you choose 4 pilots with differnt abilities, strengths and weaknesses to to save Kyrstal, the planets and defeat Andross once and for all (even though General Scales will be the true final boss). Star Wolf will be back but this time, will be rivals against Star Fox for some battles and even help out alomg the way like what both Katt and Bill have done in 64. Star Wolf is no longer fighting for Andross as both Pigma and Andrew are no longer with the team as they will be their own boss battles (Pigma doing his own thing and Andrew still loyal to Andross). Also, this is where Panther gets introduced.
That's my idea of reintroducing Miyu, Fey, and Krystal along with General Scales and Panther. It's sloppy, but I can imagine an Adventure-like plot with SF2 and Assault characters included. Katt and Bill will still be around as well and the gameplay is like 64 but this time, with SF2's Walker. The Landmaster and the Blue Marine can still be around.