Yes, it may indeed sellout. I am sure it would in many other similar markets like MKE, OMA, CMH, MCI, etc...The problem is, Florida markets are generally very low-yield, thus making a larger aircraft unnecessary for a medium sized market like IND. The best bet for IND will be Midwest Express service. I have heard a lot of "water-cooler" talk about them making IND a focus city, that could mean offering flights to and from South Florida. But they certainly don't fly the cool iron that American does.
To most people, the sky is the limit. To those who love aviation, the sky is home