Considering that behind the scenes, Warlord Games must be doing year round prep for the next Epic release, involving quite a few people, they do a remarkable job of keeping things under wraps. Sculpting must already be advanced or even done. In the world of social media and the tendency to want to capture viewer numbers and likes etc etc, then much kudos to their staff for that.
There must be a commercial point at which announcement becomes an acceptable trade-off against sales lost on the most recent release, so I suspect they will want another couple of months of sales from ECW in particular before they start diverting peoples wallets towards new product.
The Austrian question interests me very much, will the sprue go pre or post 1809 with us getting either Helmet or Shako. I would hope for the former, but perhaps the latter is easier to tool for non-multi part frames.
Last year, Warlord seemed happy for the rumour mill to speculate on either ECW or Rome / Carthage (or Gallic), we got ECW, so maybe an ancients set is next, especially as we have a new edition of Hail Caesar.
At what point another napoleonic module gets inserted into the line, who knows? Near future I would hope. I seem to recall that Napoleonic British Epic was WG’s biggest seller last year, so that might be a useful nudge for another napoleonic module.
If they are only going to release one module a year, then I imagine napoleonic might have to wait. AWI or Ancients would allow Epic to grow market share, while another napoleonic module would consolidate.
There are voices who want a second wave of ECW / Thirty Years War releases too.