Shaq is paid $20 million this year and $20 million next year, so there's really no way to bring him here in the short term.
I doubt Shaq would want to come here and be seen as the fourth or fifth best player. He's universally seen as a top-four center now, I think (along with Russell, Wilt, and Kareem, slightly ahead of Hakeem), and no number of rings would move him up on that list, in my opinion.