Not bad, Doug, although there are no dragons or other planes in your configuration--both seem rather necessary.
What if we went by tiers? What would Heroic, Paragon, and Epic look like? (And yeah, I know those are 4E-specific, but each edition has an equivalent level range...the idea being what those tiers exemplify).
Heroic would involve the PCs making a name for themselves. Adventures would be local, the setting ruined keeps and dungeons as well as wilderness locations. The primary foes would be humanoids, standard minor dungeon denizens, and some undead.
Paragon would involve the Underdark, drow, illithids, giants, etc. A foray into the Astral Sea and other planes might occur towards the second half, with the PCs becoming embroiled in a githyanki war. Some major undead villain would be faced: A vampire, lich, and/or death knight.
Epic would focus on either empire-building and world-saving. First the PCs would carve out their own kingdom, slaying a dragon to do so. Then they would have to save the world from an extra-planar invasion, eventually facing Orcus, Demogorgon, Asmodeus, or Tiamat.
But that is just a rough sketch. In some ways, what I am looking for is what a campaign would look like if it were the only D&D campaign you would ever run again and you wanted to get your fill of everything good about D&D, as well as show someone else the "best of" the game.