Extra ideas that are pretty good

I think that adding new gems like garnets and rubys, making a free, no login or account needed web based preview to make people more interested, but it doesnt let you go to the End and it can only be played for 60 minutes, but has all the features (like red stone machinery and mobs), and can be toggled, cheats , command blocks, creative/survival/hardcore/easy/peaceful modes all included, that can be played in the official Minecraft page, that gives you the best experience, and maybe at the end shows you how to download the free trial and the full game