One caveat to our prediction and one concern
It will definately be American Airlines and we believe it will be their Regional Airline Piedmont. Outside chance it could be Republic, but we are sticking with Piedmont.
Piedmont flies the Embraer 145s, but it is not capable to handle CAT III since there is no autothrottle or autoland. Having CAT III will still help, however, since the company will allow going down to company minimums.
On the other hand the Embraer 190 that JetBlue uses does have autothrottle and autoland and is capable to handle CAT III.
By the way the Embraer 175S that Republic flies is capable to handle CAT III.