Have you seen this?
Its not speculation its pretty much confirmed, Wanda shows something to every hero, it would be easy for her to affect Hulk's unstable mind. The fight is real
Either Ultron gets that body very early in the movie or Tony uses that suit up until the end, I'm hoping for the former, that would mean Ultron could have another form we haven't seen
Also remember that the suit may be changed later in final edit. Or that those two scenes are not linked. I don't know if you are aware, but until the final cut of the film, which could take till just 10 days before the first showing, nothing is set in concert. I've seen trailers where all of the content was cut from the final theatrical release. It's way to early to draw any definitive conclusions.
That shot of iron man and the ultron shot could be completly different time points in the movie. Or both the ultron and/or iron man suit/body could be changed. Though it looks like they could go together, that doesn't mean they do.
As for what was brought up after my post earlier about the SW...(by other members..this is not directed at anyone specific) just because she puts the person into a nightmare doesn't mean they are physically in one. By that I mean it could be like a waking dream, where Hulk thinks he's fighting ultron drones but is in fact hitting civilians. The way her powers work is a bit of a mystery at this point. I only meant to convey that based on what I have been told and heard from other friends that have worked on the set is that Scarlet Witch is the one responsible for whatever sets hulk off, if that be by direct control or manipulation or waking dream or any other means is a mystery. Just that it's not a direct result of ultron controlling him or the HB suit. At least from what I've heard. Again, films not finished yet so anything can change, and usually parts do to prevent exactly this type of info always being right.
As for the Hulkbuster armor being a dream or alternate reality version only..I've not heard that being the case. Anything possible but I find it unlikely. I heard that it's something that stark and banner do together in someway. Or at least the planning of it or refining. Vague I know. Sorry.
The scene where stark says ultron name...seen some post saying that maybe that's because he knew about ultron before....from what I have heard of the story this far is that he does know of Ultron because he either discovers or re-discovers the program. I know there's info that he's a chitauri virus, though I've heard otherwise. Not saying what I heard is correct for sure, as they could have shot multiple versions to throw people off, or I (or the other persons sources) could be wrong. But what I have heard is that during the clean up after the New York invasion and/or the hydra shield fight in WS a long dormant defense program is re-discovered and at some point Tony and Bruce start working with it. So it could have been in an underground base that was opened up by the attack or something like that. So the program/virus whatever it's called was not alien but just discovered due to the alien invasion. Again...this is speculation. But so is the other version. I'm not pulling this out of thin air though. I have gotten the info from people that where/are working on the film. But that doesn't mean (as I've said) it's 100% accurate either. Just passing along what I've heard.
Anyway, back to that scene where Tony seems to recognize ultron...I've heard that by that party scene all of them know who he is. In fact that scene is set after the first battle where the drones attack the team. They think they have won and ultron is dead or offline. That scene is the catalyst for Vision I've heard too. Because after it they know they can't just beat him physically and need another strategy. Another sentient computer program to fight him. So Tony uses Jarvis to make vision. Which I've heard pisses thor off to no end. Anyway...I'm sure I forgot to address something but This is all I can recall at the moment. Lol
Especially if I'll be paying $1,000, $1,100 for two figures. That won't stop me from getting them, but still, pissed. 
