3. No, I was re-ordering the things because I had more to say about 3 than about 4.

4. Except Bill was working with Lannette to help her build the Hoenn PC system, something he (I think) mentions in FR/LG. There's plenty of references...but, they're fragmentary at best, so...
5. I'd actually expect a "Unova section" in the remakes more than a "Hoenn Section" in Gray. Makes more sense to me, and if Gray ends up with more urban environments than natural ones, the "Unova Secion" in the remakes would be a good way to keep them around (i.e. the remakes happen some number of years before Gray, so Unova is not as urbanized as in the future).
6. Well, since there's a Rocket grunt in B/W who remembers the old days, I'd kind of like to see the remnants of all the old teams unite, under the unwitting control of Cypher (but we wouldn't learn of this until very late in the story). When you break the alliance up, the old teams realize Cypher was just using them, and they turn on Cypher, prompting the Cypher leader to promise revenge...thus setting up a more major appearance for Cypher in Gen VI. The thing I like about an alliance of teams is, there's more of an excuse for balanced grunt teams, like with Aqua and Magma. Yes, they're all still "themed" for Darkness and/or Poison (meaning the same two counter types would still work), but...I just want to see more variety in the villainous teams, especially in the grunts. I cheered when I saw that the Aqua grunts had Carvanha at the Museum battle when I delivered the Devon Goods; I'd like more of that in the future.