Combining planes?

[Guang]

I'm considering combining a few games, and wanted to know how that might affect my game.

First, thinking of combining the First World with Elysium. Azata are fey-like anyway, and it feels right to me.

Second, thinking of making the Prime Material, or whatever we call it in Pathfinder, the Plane of True Neutrality. All the other alignment-planes are competing for it.

Would love to get some opinions on what this might change or mess up. Thanks.

[Guang]

combining a few planes. Not games. Sorry for the typo.

[default]

i've been undergoing a similar thought process for my own campaign setting. so far ive got this:

- The good planes have all been rolled into one, Heaven. The others are simply locations within said planes, such as the Fields of Elysium, Nirvana, etc.
-The abyss has no layers, and is in fact more like Limbo, with floating chunks of land forged out of the raw chaos by demon lords, archdevils, etc. The Nine Hells are actually the largest domains within the abyss
-Limbo is more or less unchanged
-My plane of Law is the Demiurge, a sort of 'Framework of the Universe', from which the axiomites send the inevitables out to maintain the laws of reality
-The elemental planes exist as normal.
-The last plane is the Beastlands, a neutral plane filled with every conceivable biome on the material world, mashed together hap-hazardly with no real rhyme or reason. You can walk from steaming jungle to boreal forest to scorching desert in as little as a few hundred feet, to as many as hundreds of miles.

The abyss, Limbo, and the beastlands have varying degrees of morphism. Nearly anyone can shape a chunk of raw chaos into a chunk of reality, but it takes someone VERY powerful to keep it that way. The beastlands cannot be shaped so swiftly, but you can exert your will to 'shift' the environment, such as an area slowly becoming soggy and swampy, or drying a plain into a desert. Heaven will slowly change to accomodate a Good being that takes up a residence. This is how outsiders shape their domains.

[Mechagamera]

I like to modify the classic outer Great Wheel (in all kinds of ways, but specifically) by making half of them transition zones. For example, Ysgard is the transition zone between Arborea and Limbo. If Arborea grows in strength, it pulls part of Ysgard (and the souls there) into Arborea. If Arborea weakens, part of it might flow into Ysgard or Ysgard might be more absorbed by Limbo. Ambitious types (like players' characters) can go into the transition zones to tip the balance or take power. The intrigue potential is pretty high, since at the very least the two neighboring powers will have agents there, plus the natives (who may or may not be partisan), and other powers may have more subtle goals (the devils may want Pandemonium to flow toward Limbo instead of the Abyss to keep from adding to the Abyss's power).