ORLANDO— InterContinental Hotels will operate a 1,260-room property in the Palazzo del Lago project being developed here by the Hospitality Development Group, Inc. According to local press reports, the $800 million resort will be located in the Lake Buena Vista area on a 42-acre parcel on Lake Bryan. The project also includes a 994-unit villa development. The hotel is a first in Orlando for the InterContinental brand, which is the deluxe brand of Atlanta-based InterContinental Hotels Group.