User blog comment:GeorgePowell/How do you think Mass Effect 3 will end?/@comment-1942617-20110704004017

I'd say it'll work like this:

The Ultra super awesome good ending:

Quarians get their homeworld back through negociation, Salarian and Krogan relationships improving. Reapers destroyed. Cerberus Destroyed. Good big huge ending choice.{assuming there is one} Shepard lives happily ever after with his/her romance if applicable.

The Mixed not so awesome not so super ending:

Anyone of these variables changed apart from the Reapers being destroyed.

The Crappy bad ending: Reapers win, destroy sentient life. Probobly throw in some renegade choices in those variables above as well...