For "Enterprise", we didn't get a proper, real shot of the NX-01 until the opening credits sequence of "Broken Bow". Before then, we'd had a couple blurry shots, a detailed TV-Guide spread of the top of the ship, and that was about it aside from masses of fan speculation based on leaked details and sketches based on the above. I imagine this is what they're aiming for with Discovery... At least with this latest trailer we have a blurry shot of Burnham on what looks to be the Discovery bridge!
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Mark