The trailers do show a second shoulder, as well as the chest plate and even a jetpack being added
Gold-Helmet is already, like, my third favorite character
He's not really legendary. Like, I guess people are comparing him to Boba Fett, which I get, but he's only ever explained as being "the best in the parsec." That's not a mythical feat, that just means he's no legend. What's really more special about him is his heritage. I mean, IG-11 can do nearly as much as him, but walking slower.
Also, I have this crazy theory:
So, we have this Empire dude, right? He wants Yoga (that's its name, that's what I'm calling the child), hopefully alive, but if not, he wants it dead. This Empire dude is seen wearing some cool Sith robe-style clothing, which makes me consider the possibility that he's a Dark Side enthusiast, like the guy in Vader's Castle in RO.
After witnessing Yoga's species and power, it appears that Empire dude wants Yoga to be some sort of weapon, training him in the Dark Side to bring about the return of the Sith. I mean, everyone knows Yoda was some super legend, what if he was working with the Sith? Anyways, if Yoga falls into the hands of the heroes, the not-Empire, he may very well be brought up by Luke and become yet another enemy. So how does Pershing come in (the nerd who startles Mando)?
This part I can't take complete credit for. I saw somewhere that Pershing was wearing a uniform very similar to Kaminoan clothes, which are tied deeply with cloning. But why does he want Yoga alive? He clearly retaliates when Empire dude suggests Mando brings him back dead if not alive, so he most likely plans to clone the infant. I don't recall if Force has been confirmed as being able to duplicate in the canon, so perhaps an army of Sith Yogas may be a reality, but its also possible that Pershing isn't a jerk and just wants to see the return of Yoda's species.
IG-11, however, puts a very interesting twist on this story. 11 claimed that he had specific orders to murder the child at any cost, but this isn't what was told to Mando. These two are obviously hired by separate parties, which explains why neither knew the either would be after a shared bounty. But who out there wouldn't want a baby Yoga? My guess is that it's someone who doesn't want Empire dude to get his hands anywhere near the child, and is desperate enough to hire a droid and a trio of Trandoshan hunters to kill it. These only leads me to conclude that IG-11 was not hired by a villain, but perhaps the hopeful hero, willing to sacrifice an infant for the galaxy.
Basically, IG-11 = Good, Mando = Bad. Of course, I don't mean the characters themselves, but who they are being hired by. I doubt Mando will give up Yoga to Empire dude, but we'll just have to see.