TAMPA — Saying they will be stronger as a team, leaders of Tampa General Hospital and the Florida Hospital system announced Tuesday they are joining forces to develop new health care services around the bay area. They didn't say exactly what those offerings might be, but emphasized that they are joining only for new ventures, not consolidating existing operations. Each side will contribute $1 million to establish a board that will figure out how they could partner. Possibilities include a freestanding rehabilitation complex like one Tampa General has for several years considered for Kennedy Boulevard in South Tampa, officials said, or a "big box'' concept with numerous outpatient services provided under one roof, outside of a hospital.