A resume belonging to a 3D animator at Taiwan-based XPEC Entertainment has Knack 2 listed as in development.
According to the animator, she has been working n Knack 2 since May 2015, specifically on “animated 3D character motions and cutscenes for PS4 system.”
Knack 2 has since been removed from her resume after the information was posted on NeoGAF. Because of this, consider all of this a rumor for now.
XPEC Entertainment has been used as an outsource development company for titles such as Final Fantasy 15, according to Gematu. It has also developed its own titles.
Developed by SCE Japan Studio, Knack was released as a launch title for PlayStation 4 back in 2013.