Originally Posted by pr0xyt0xin
What makes you doubt that?
Joss says "Like he did in the comics, you want him threading through the universe and to save the big finale for the big finale. He is definitely a part of what I have got going on."
And I think that MoE (Thanos involved) is far more likely than MoE (Thanos not involved). In fact whatever villains they choose "Thanos involved" seems far more likely than "Thanos not involved."
It makes no sense. How does he get them? Why do they decide to work for him? it will get wearysome. Thanos got loki..loki failed. thanos gets the masters..they fail.