*gets reminded of a RTS where it goes "reinforcements have arrived" *
Anyways, the assualt on Hueco Mundo begins, while Aizen becomes a one man army and takes down Karakura, TRAGEDY APPROACHES!
Hmm... Aizen's army is made up of six extra strong beings. Top 3 espada and the 3 captains. Gotei 13 has 6 captains committed and there are also 4 more extra strong beings in Karakura. Aizen is in for a ride. I also expect once he invades Urahara will realize he needs to re establish the portals. He has some tricks up his sleeve but it is not brute force.