So basically I've come to say that Kat is amazing and we would be honored to have her as an allstar however the leak was just not a good enough picutre to prove her rosterspot.
Time for a re analysis.
If you go to the picture of the Kat leak you will see a collossus in the background now look at radec and slowly scroll down. You will see the blured grondline on which the collosuss is walking. With this doesn't it look as if the Loco roco image is cropped over the Collossus walking image?
Now look to nathan drake jumping freely in joy. Notice his size. now look to this ign link
Note the size of radec on the bottom picture. the preportions are all off considering the Kat pic makes this stage look much smaller.
Now look at the Kat leak pictre. you will notice that Kart in this picture is missing some details If you look closely enough. Her features are all blurred out more so then the object around her. almost as if rough scale her her primary colors was pasted onto the image and then blurred to hide the lack of shading and details
With this I conclude the Kat leak picture to be fake.
Rising is a good point but she already has a pretty strong following. almost everyone I know who has a vita has the game and almost everyone I know whose played the game loves the charecter. With the vita getting more popular a Gravity rush sequel is inevitable and then pending on the success of said sequel the charecter could go portable platinum.
She's definitely a rising star and easily amongst the ranks of characters like Jak & Daxter and Ratchet & Clank at this point.
It could be my bias though since Gravity Rush is the most impressive game of the past five years.