Game developers like telltale games have already revived several franchises through this medium:
I'm thinking this could be a really interesting way to bring Quantum Leap back, and still include the original actors.
Dean Stockwell may be too old to play Al, but he's more then likely not too old to voice him in a virtual medium:
Have a look, and please, tell me what you think of the idea.
I only wish it were possible to get in touch with whoever owns the rights to the franchise about going ahead with something like this!