There wasn't much revealed at Sunday's in-store demonstration event and the videos still haven't been posted online, but there's one new piece of information I want to share today.
It appears that import stores have now begun listing the Asian version of Sengoku Basara 4 Sumeragi. It's identical to the Japanese edition for all practical purposes but the cost is lower because it's targeted at markets outside Japan. The in-game dialogue and on-screen text will all be in Japanese though there might be Chinese/English text on the packaging.
Here are Play-Asia's listings: PS4 version and PS3 version
The most interesting part is that Play-Asia is listing the five 'early reservation' weapons as part of the PS4 bundle. It's unknown whether buyers will receive the downloadable wallpapers and there's no 21 Costume Hobby Box Edition available, but if you're on a tight budget this is probably the best deal.
Information is scarce at the moment but I'll post as soon as I find an official press release.
Note: If it's true that the 'preorder exclusive' DLC codes are included, you may need to set up an Asian PSN account to activate them. This is very easy to do and doesn't cost anything.