The marketing for Issue 12 continues in this latest reveal. Typically, every issue brings along with it's major features a good number of QoL or "Quality of Life" changes, Issue 12 is no different, and one of it's most notable will be the inclusion of an updated Character Creator interface.
This interface update will allow players to get a full rundown of info for every power as they create their character, with such options as showing the effects of a power in PvP vs PvE, as well as level scaling to show how the power performs at later levels. The updated creator will also allow for one to choose from pre-defined costume setups to save time when wanting to work from a base costume style, such as Jester.
Some additional info from City of Heroes/Villains Programmer, pohsyb:
The detailed power info will be available in the power selection screen, level up screen, respec screens, enhancement screen, and as another tab on the info window for powers.
You can view the full update here.