In reply to theruleslawyer :
Good point. EDX would be the lowest-hanging fruit, but if they wanted to lean more into the "coupe-like silhouette" they could go with something like CDX.
However
To lean into the coupe thing even more, Acura could even use "C" as the middle letter–perhaps something like ACX or RCX or even ZCX?
I'm probably putting too much thought into this.