I'm pretty sure it's the Ajax that is visible behind the bar though (and from the bridge too), but yeah the animated engine glow along with the other animated bits in WC3 (doors, crew, etc) was very cool.
I don't really see the visual connection between the WC3 capital ship designs and the capital ships revealed so far in Arena. Apart from the shown Midway-class ship, the Arena capital ships seem to derive more from the WCM designs, especially as the "Give 'em a broadside, Mr Gerald!" scene from the movie appears to be the inspiration for the capship vs capship map shown in Arena.