I'm not sure any more if there will be a remake at all. I came to this conclusion after looking at the "time line" of Pokemon games:
Let's say Pokemon FireRed and LeafGreen started in the year 0.
Year 0: Red defeats Team Rocket and becomes champion of Kanto.
Brendan defeated Team Magma and Aqua and became champion of Hoenn.
Year 3: Gold defeated the revived Team Rocket and became champion of Johto (and Kanto?).
Lucas defeated Team Galactic and became champion of Sinnoh.
Games in the same generation are set at the same time, as it's possible to link to each other without the use of special "things", like Pal Park in Gen IV and the PokeTransfer in Gen V.
And now, where is Black and White to be placed? To be honest, I've no idea. If Ruby and Sapphire would be remade, Black and White should be 3 years before Diamond, Pearl and Platinum right? Wrong. In Undella Town, Cynthia mentions Lucas after the player has beaten her. So Black and White should be after Diamond, Pearl, Platinum, Heartgold and Soulsilver.
And then it'd be unlikely to have a remake of Ruby and Sapphire in the same generation.
Anyway, I am confused.