Expansion within view, so il post the question i know many on my guild have, will mists of Pandaria add one or more character slots?

many of us myself included have alot of characters and is currently character locked and i kinda want to stick to my old realm when it comes, but i dont want to transfer or delete any of my already existing toons just because of a new class,

will i have to delete one class in order to get the Monk? that is my real question, if someone has already asked this please just show me the forum link or plainly answer.