The collection of lawmakers who gather under the Gold Dome of the Georgia Capitol for the state’s annual legislative session seldom are lacking for topics of discussion, and 2016 isn’t likely to be an exception to the rule. Two issues likely to get some attention from legislators are the rules for formation of new cities, and the separate, but related, topic of annexation of unincorporated areas by city governments. As a result of some previous changes in state law, there has been a sharp uptick in the number of efforts to form new cities in Georgia — largely in the metro Atlanta area — in the past few years.