Dunno if it's time for new ships or not, but if they ever decide to do it, Spain is definitely a top pretender. Even better - an mega fleet, made of ships from various nations ( = more ships that actually existed and less projets that never saw a green light ). Spain + Sweden + Finland + Argentina + Brazil + Chile + Turkey...and I would really like to see some Austro-Hungarian ships. With all the lvls, classes, upgrades, premium and event ships, there's room for them all. Sad it's not 3-4 years ago, when a new nation was still likely to happen.
But if they ever add a single ship with the graphical quality of the last batch of EBBs, it will be a pain to watch it running around.