Looking Forward to City Naming (and hoping they eventually add the ability to Keep/Choose your entire Civ's Name/City List/Graphic style)
Also looking forward to "One More Turn" in modern.....and hopefully they can extend that to allow "One more Turn" in other ages as well
(play an age,.. when it reaches 100% you get a save game and from that "save point" can either
Go to the Next Age
or
One more Turn in the Current Age
so you can do Swords and Sandals Eternal or Forever Musket Wars
They've talked about eventually adding win conditions for eras - ie so you can have just an ancient era game - and that would be a natural fit with that.
Honestly, from the initial promotion, I thought single era games were something explicitly part of it already, so I was somewhat surprised they weren't.