So to clarify how this server upgrade is working and what is in question:

1. Everything that is physically in worlds outside of the old darklands, nether and end, be it in chests, in your inventory or in itemframes etc, will be preserved.
2. Everything that is in the shop offered for sale, or in your depositbox – the does NOT have enchantments or extra data, will be preserved.
3. If you had something special in the store or deposit that was enchanted or had other extra data (books, potions, tipped arrows) that you need to be preserved, please let me know. We can restart the old server for a while so you can pull it out and put it in a chest.
4. Same goes for the nether or end. If you had something REALLY special there, let me know then we can restart the old server for a short while to clean it up.
5. Once we upgrade, the old nether, end and darklands will be reset. All other worlds will be kept.