Adversarial schmadversarial

In a Facebook group where distant friends and I discuss various types of gaming, I shared an idea:

I would love, as a DM, to transport a "D&D" party from one [famous commercial] module to another without telling them what I was doing. Ideally, from dungeon to dungeon. 

Their dawning realisation that they weren't where they previously thought would be delicious. 

It'd also be a rad challenge for them to jump into a scenario sans background knowledge, specific preparation and any progress towards its completion!

You could spin this into a campaign where all major dungeons were connected.

I was picturing like [an imperceptible improved teleport] from a room/corridor in "Ravenloft" to one in "Tomb Of Annihilation".