Well, AA hasn't had 747s in many, many years, and doesn't have any on order.
Too early to tell how it'll pan out. If traffic merits it, you might see AA 767-300s. You could also see reductions in nonstops out of PHX should they downsize the hub and you'd need to jump over to LAX instead. More likely, though, there won't be any appreciable change in the short term.