I'm inclined to agree about Iron Monger, but there does need to be someone from the Iron... series, to have made the Ultron bots. But yeah, I don't recall there ever being any real evidence. But then again, Black Bolt and Reed were a surprise too, so you never know. I don't even really mind if there are no extra cameos that were cut from the footage. I just want to see it because I just know it's going to be nuts. Multiple people reported that the first screening didn't test well because Wanda was just too evil and the kills were too much. Pfft to that. When we've already got Deadpool going as hard as an R rating would go, I doubt anything they had Wanda doing was nearly as graphic as some of that.