Originally Posted by darkslayer101
i wonder how they are gonna tie extremis with super soldier....
there is potential for Cap or Banner cameo but since Feige denies that...maybe thats left for Post credits
I think it will just be like another mad scientist, Killian in this case maybe or a higher up we don't know about yet (Leader maybe?). Who is trying to replicate the serum or possibly modify it in this case to make a superior race. So maybe not a replica but a modification or something.