I like this idea, and think it would dovetail nicely with an idea I've had about DisneyQuest for years now: YesterWorld.
They have the roller coaster simulators already. Fill the space with simulations of dead attractions. Judging by the conversations here, there are people who would pay a premium to be able to ride Journey Into Imagination, Horizons, etc. again.
As a way to draw people to Disney Springs, they could also include rides that are currently closed for maintenance/refurb with the day's admission to that park.
Finally, (and here's the real moneymaker,) simulations of rides "in development". These would not be open to the public. They could beta test them on select focus groups BUT offer vouchers for one or two "test rides" per year included with DVC membership.
What do you think, sirs?