Re: DC's New 52: Reviews and Discussion (Spoilers welcolme and likely)
It's not been made clear how exactly the suit works yet. We just saw in the finale to the opening arc as Clark bonded with it before he went out and fought Terminus (or whatever one wants to call Brainiac). We saw it as you state, when he was chatting with the League, and we saw him wearing his regular costume. I'm trying to understand it with you and just suggesting theories. I've no clue.
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Ignoring the The Last Stand since 2011.