Ive been playing minecraft for a while now and so people are probably used to the old thing, from at first your punching down trees, then next thing you know your in the nether, and then at last your at the end fighting the ender dragon. everybody thats played minecraft for atleast a couple months knows the roll, tree punching, then nether, then the dragon. so today im suggesting a new biome/portal, i dont know what to call it so since the nether is based off the underworld or hell we should make this place the upperworld (or if you want heaven) which the portal can be built like a nether portal but with quartz and lighted with water and it will send you to a place thats mostly white with news ores, blocks, etc such as say the cerussite, which in real life is a type of white lead or for a block it could be the cloud block, and for a mob it could be say the angel (the angel could also be used as a new boss) or something other, but thats my suggestion for a new biome/portal and its new items.
The nether may have been modeled after various versions of Hell (the hot ones), but there are no explicit demons/devils (and certainly no Satan).
Given the international (and multicultural) nature of the player base, avoiding any religious references (beyond the most passing) is likely a 'thing'.
Setting up a new dimensions as an anti-hell/paradise also creates a game design problem in that it would be illogical ever to leave.
The two current 'other' dimensions are [very roughly speaking] a continuous, waterless volcanic cave and dust motes in infinite space.
In addition to needing a great deal more detail, any new dimension would need to be signnificantly different from all three current dimensions. ["Like the overworld, but with…" would make more sense as a biome.]
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WARNING: I have an extemely "grindy" playstyle; YMMV — if this doesn't seem fun to you, mine what you can from it & bin the rest.