Prediction - iPad Pro
So the new iPad is touted for being much thinner, lighter etc., and with the name iPad Air. Also, they have been rumoured to be experimenting with larger screen sizes. A lot of people complain (about the iPad Air) that they don't need it to be thinner and lighter, and that they would rather have a larger battery. A lot of people also wanted a more powerful processor.
My prediction is that they will release another iPad, called the iPad Pro - falling in line with their MacBook naming scheme.
It will either be the same screen size of 9.7", or a larger screen size around 11". But it will come with a touch-cover style keyboard, a faster processor (A7X) and a bigger battery at the expense of thickness.