yeah no cowering... but I see no issue with a bit of fear. He basically has been captured and presented to a "god" like a sacrifice. Supes also looks pissed as hell, and not the usual farm boy in tights. Bats is a smart enough man to know when he's tied down and confronted by a near indestructible super being, this could be the end...
If he had no reaction, why would we? Stakes are only stakes if you believe the protagonist is in some sort of life threatening position.
To bring another franchise into this... When Darth Maul was revealed at the end of Phantom Menace, and Obi and Qui gon casually drop their cloaks and light their sabers, I had zero investment in the fight. They didn't seem overly concerned or threatened by this bad guy, so I didn't give a crap at all during the whole fight.
In the Force Awakens (trailer), Finn looking like he's going to crap his pants when Kylo Ren comes at him immediately makes the situation seem more threatening and the scene more intense.
^^THIS. It was such a brief moment, but I felt SOOO much fear and tension in that spot. I'm pretty free of spoilers and don't want to know, but looks like Finn is in a spot where he has the weapon, but doesn't know how to use it, and is facing off with Ren, who knows a heck of a lot more about saber fighting than him, but is forced to use it out of protection.
Anyway, back to the actual topic of this new teaser... I don't know how I feel about it. I'm still not liking a great deal of what I'm seeing, but I really have to view the movie to know for sure what it's all about and think they're using a lot of misdirection.
Maybe Cavill is pissed because Affleck got Garner pregnant again and has nothing to do with a Batman/Superman moment.