This isn't a new issue, but a whole new expansion which would seem to indicate an entirely new city to explore and a new box copy on shelves. Also, from the email that went out:
City of Heroes Going Rogue officially opens the "mirror universe" of Praetoria and an all-new alignment system that explores the shades of gray that lie between Heroes and Villains. For the first time, Hero characters can become Villains and vice versa, enabling Heroes to cross over to the Rogue Isles™ and Villains to experience Paragon City™.
So, side switching in CoH/V will finally be implemented. Also discussed by the devs previously have been two new powersets: demon summoning and dual pistols.
Without doubt this is the major substance that Paragon Studios is going to be using to try to blunt the impact of its new competitors... but this is dependent on when the Going Rogue expansion actually launches. My initial thought was "Wow, a direct move against Champions Online!" which launches in July 2009, but that can't be right. Paragon Studios is already late with one issue - I15: Anniversary, which had obviously been planned to launch sometime in April 2009 when it actually was CoH's fifth anniversary - and a major new expansion isn't going to get beta tested, finalised and on shelves in just six weeks. It's more likely that Going Rogue is (at the earliest) a Q4 2009 release, if not maybe something for 2010 as a competitor for DCUO.
So, good news for CoH/V - more new content, more powersets, the highly requested side switching - but it is going to be a good while before players will get their hands on it.