At the end of Star Trek II: The Wrath of Khan, as the Enterprise escapes the nebula, leaving the dying Reliant behind, we see Khan engaging the memory banks of the Genesis device.
Later we see Spock's coffin torpedo ends up on the newly formed Genesis planet and as part of the result of the Genesis effect, clearly gets resurrected.
Wouldn't Khan have been resurrected too? Although, yes, the Reliant was destroyed by the Genesis wave explosion, shouldn't he (and his crew??) have been resurrected as a by-product of the Genesis effect as well?