Re: A Vulcan raised by elves
Actually the Holodecks allow for crossover as an integral part of the setting, that's what they're there for! So sure, there could be a "Lord of the Rings" Holodeck program, this is not crossover, as the worlds simulated in the Holodeck are not real relative to the Star Trek setting, but any characters stuck in the Holodeck don't know that.
The problem is the idea that a child would be trapped in a holo program for most of his life and that nobody would notice that a child was missing and there was holo program running non stop for years.
The boring one, the one with Khan, the one where Spock returns, the one with whales, the dumb one, the last one, the one with Kirk, the one with the Borg, the stupid one, the bad one, the new one, the other one with Khan.