Ancient Greece it is!
However, all themes would be most welcome in my eyes!!!
Although, I have a little background story to tell you and, in a way, its a dissapointing one...
A couple of years ago, I spoke with a toy shop owner here in my city and he spoke to me about the seminars Playmobil is hosting for retailers. Apart from Playmobil suggesting to retailers how to promote their toys best, they also ask for feedback... feedback on sales, on people's attitude towards certain themes etc etc... Retailers proposed for an ancient greek theme to be introduced but Playmobil's responce was negative because, at least at that time, right after the Roman theme was out, which we all know it not had much of an appeal to the younger audience, such a theme would not be marketable.. in other words, Playmobil feels that an ancient greek theme would not be profitable for them to produce and put on toyshop shelves... somehow, that is what their research has concluded a couple of years ago...
But, the same was argued about the western theme a few years ago and now we have a ner re-introduced western series... so you never know...