He's a possibility if the following three things are true:
1. His contract doesn't stop us from getting something else with MLE. So if Danny is going to pickup some talent by trading Sheed and others, and not spend the MLE, then you could use some MLE on Shaq.
2. He's willing to take a two year deal or less. No tying up cap after KG is gone.
3. He's willing to go to the bench if that works. It might make sense - he'd play against second tier centers, the first unit would remain consistent (once Perk is back) and the second unit gets a still good offensive threat.
However - you can't know #3 when signing Shaq, and that's a problem.