Well, I say Polemos: Ancients, but Baccus have decided to split the era down into more manageable chunks, so this first set of rules is, in fact, Polemos: Imperial Rome.
They have posted a small preview of the rules, which essentially covers some of the more ‘sticky’ questions of units types and basing, on their website.
The good news (at least from my point of view) is that this game is keeping with the ‘standard’ 60mm x 30mm Polemos basing convention (though you can use others). However, this does mean that it will fit in well with 6mm armies that are based for Impetus/Basic Impetus, as thebase size is exactly the same.
I assume that given the relase date of April, these rules are actually being aimed to be released at Salute – another excuse to attend the show!