Quote Originally Posted by DeathscytheVII
I thought vasto lordes were supposed to be menos...so that implies a ton of hollows merged together, of course, i guess they could all merge into one personality. But this is what i'm confused on...Are Vasto lordes arrancar? or did aizen take vasto lordes and made him into arrancar?
Vasto Lordes are the most powerful a Hollow can get. Arrancar are hollows that ripped off their mask to gain shinigami powers. This makes said hollow more powerful than the regular hollow. Now, imagine a Vasto Lorde level Hollow taking off their masks.

The result?
Most likely half or all of the people gathered with Aizen in the last scene. These creatures were already powerful in hollow-state.. but now their power has reached to insane levels...

So... Prepare for destruction and such, methinks

----
Oh, and Neo... Aizen is an arrogant bastard. There is no way in hell that he would even think about having a low level hollow in his 'friends' circle.
You say that you shouldn't assume that the people in the ending are all above captain class. Wrong! It is widely known that menos-level hollow are something that even captains don't like to take on due to their power. All of the people in Aizen's room are human-sized. This automatically makes them either of the two highest level Menos types (not all of them have to be vasto lord level, because we only saw them in shadows and some size differences may be there.) being turned into Arrancar. Menos types are not a captain's best friend.. Menos types arrancar should make some of them shit themselves out of pure fear.

Just a matter of doing the math