Today the first piece of artwork for the next Hyperdimension Neptunia title was released. As you may already know, Hyperdimension Idol Neptunia PP is going to be an idol simulation type of game instead of a standard RPG which explains why Neptune is wearing the outfit that she is in the image to the right, which can be clicked for a larger version.
Currently little is known about the exact gameplay aspects of Hyperdimension Idol Neptunia PP, but it is known that the company developing it is Tamsoft which is known for their work with Dream C Club and that it is meant to be released on the PlayStation Vita on June 20th. As for a Western localization, it is certainly possible but still up in the air.