Having a pre-made adventure is great for DMs who are short on time to prepare for their game. Just swap out a few things to make it pertinent to your game and off you go. The Black Lotus of Thalarion is a new pre-made D&D adventure that's up on Kickstarter now.
From the campaign:
The Black Lotus of Thalarion is a Menagerie Press D&D 5e (fifth edition) RPG adventure for level 5-7 characters, and is placed in a system-neutral setting. The adventurers are sent into the Dreamlands to pluck the fabled black lotus from the moss-ruined garden of Thalarion, the City of a Thousand Wonders. The fabled wish-granted lotus is guarded by gibbous demon servants, beyond the city's carven gate
The campaign's closing in on 8x their funding goal (being fair, they weren't asking for much) with 14 days left to go.