Wizard Etertainment (Publisher of Wizards, INquest, Toyfaire, and IIRC Anime Insider) already has a foot in the door with a large section of the market to which an RPG magazine would appeal and the financhial resources to do it. If they had an inclination they could try out some articles in InQuest and other places to gauge reaction and then put out a magazine. Not saying they would, but they are one of the few that I see as having the resources to make a serious attempt. Short of a non-"noncompete clause" Paizo.