I'll check the Nameless Supplanter when I have time.
On a random note, I totally just got a plot bunny while typing this VM. I was searching through bulbapedia to fact-check for my upcoming story, when I came across the fact that B/W is supposedly set at least three years after the events of Gen IV (D/P/Pt and HG/SS). This means that the events of FR/LG preceded the plot of B/W by nine years, and therefore R/S/E takes places nine years before B/W.
What does this mean? Well, evidence seems to be mounting that Hoenn will probably feature in the upcoming games, with the references to Steven and such. However, it won't be a remake, I think, because that would mess up Gamefreak's careful timeline. The best alternative would be to create a sequel to R/S/E, not a remake.
Nine years have passed in Hoenn. That means Professor Birch's second child from Emerald would be at least thirteen or fourteen in Gen 5. Tate&Liza would also be around the same age. I'm starting to wonder what this new kid would be like as a protagonist. Superiority complex, because he says a successful older sibling? It's about time that we have a story where the local Pokemon Professor is the player's parent. =P
Man, the plot bunnies are forming... Brendan Birch (or May Birch, I suppose) as a young adult, with May (or Brendan) as the current Champion? What would Wally be doing? Nine years is sufficient time to kill off characters and change the entire region. =D
EDIT: By "change", I mean new Gym Leaders, or Gym Leaders who aren't the same as before. For example, wouldn't be an interesting twist if Roxanne is the Sixth GL instead of the standard First GL? Also, Tate&Liza have split up; one remains as the GL of Mossdeep, while the other is doing God knows what. I know twins in real life, and they become very troubled if they separate them for a substantial period of time. My best friends were twins, and got split because of their parents' divorce. Nothing was the same.