Dr.Muramasa has mentioned there will be no more teasers up until the release of 1.9 now, to avoid spoilers. All hints & WIP images can be found on the first post of Planned Features and Content/Guide & FAQ on the main page. 

Next Update [1.9] 

• Characters that will receive new content:
  • Anna
  • Dr. Frost and Dr. Mura
  • Norah and Alice
• Expansion of Anna's love route to balance scenes with the slut route.
• Reworked Endings (There will be good, but also bad endings), as always shaped by the player's decisions.