I honestly don't think a golf course will ever come to AC in my lifetime. 1)land is too valuable. Even if land is 'created', it would be a poor investment to make it recreation use only. 2)The island is primarily a small community/diving/fishing destination. Golf doesn't fit the profile.
Although Caye Chapel is about $200 to play, it is for the whole day not a round (which is the price in the Cancun/Playa area) and from what I hear, Caye Chapel is a great course. Hubby has been able to get in 3 rounds on Caye Chapel which makes it a great deal.