1. Planescape
2, 3, 4, 5. Who cares?
No on "full campaign adventure path". Why should players who want to have to wait for ten months before getting to play a high-level adventure? First we need several good modules at a variety of levels and play experiences that stand by themselves.
WotC shouldn't lock themselves into a twelve-module series that many players decide they won't buy after the first one or two. Adventure Paths are wonderful things, but not as the only modules you publish.

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.