Thing is: this series is taking a lot of its cues from the original pilot, "The Cage", and then that pilot the rank insignia on the uniforms wasn't all that fought out. For better or worse, at the start from these trailers, it appears that the production team is going with the rank insignia that was shown during Star Trek's pilot episode.
Maybe they'll move on from that or maybe they'll try and explain exactly how that rank insignia is/was interpreted by Starfleet Personnel in that era. Or maybe they'll progress and will get the rank insignia that we saw during the later episodes of TOS.
Time will tell.
In
The Cage, all officers wore a single stripe. In
WNMHGB, Kirk wore two stripes while the other major characters all wore one; a subtle update from the original pilot that helped to identify the captain.
By the time of TOS proper, the uniform tops had been updated to brighter colors with black collars that we are all familiar with and they had also changed to the much more detailed scheme of
wavy stripe +/- broken stripe sleeve braids that separately identified all ranks up to captain, beginning with plain sleeve for ensign. The full pattern existed, whether it was applied accurately is another matter -- but that has been a consistent feature in every era of Trek!
JJ-Trek adapted the classic TOS pattern of
solid wavy stripes +/- broken stripes and simplified it to
thick +/- thin stripes. The JJ pattern was subsequently re-used for the Enterprise uniforms in DSC S2 (when they finally remembered to include them) and we saw separate insignia for each of captain, commander, lieutenant commander and lieutenant.
SNW Pike is still wearing the specific captain insignia of the
thick-thin-thick pattern that he wore in DSC. Alongside this, we have now seen several characters wearing two thick stripes and several wearing one thick + one thin -- so whatever they are doing, it's
not a return to the insignia from
The Cage or
WNMHGB. I actually wonder if someone has mixed up the JJ/DSC pattern of thick/thin stripes with the similar (but different) pattern of contemporary naval stripes.
But I agree, time will tell.
