Why would hell be only a little map with grapes?
You can make it a whole new alternate world!
Players could get there by a special way, like drinking some special poison that makes you die and go to hell with full energy and a buff that lets you explore hell.
In hell you can make special animals(scary versions of the regular animals, or even little devils and such), new special tree's, deep caves with new rocks to mine, even houses to buy and live in!
Hell would be the evil verse of glitch, you can even make skill expansions for it, like:
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Hell mining - the ability to mine the rocks in hell.
Hell animal kinship - the ability to interact with animals from hell.
Hell gardening - being able to use your gardening skills for hell trees and such.
Hell survival I, II, II - the ability to explore hell without loosing mood, energy and such. as the skill level grows you will get more bonuses in hell.
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Such skills would make hell a place for more advanced players, at least level 15+, with enough skill and currants to be able to effectively explore hell and even live there.
I think it would be a very cool expansion, but you also need to put some risk in it, something that will make most of players rather stay in the regular glitch world.
Feel free to comment about the suggestion and even suggest more :)