So currently as it is going, Team GrisGris has no further announcement for chapter 2. However, the official twitter for Corpse Party DP has announced the oncoming remastered chapter 1 is to be released this July. It would be called Corpse Party 2: Dead Patient Neues with new software engine and slightly different contents, so be sure to stay hyped!
source: https://twitter.com/corpse2_gh/status/859767334851837952/photo/1
Oh yeah, remember to check their twitter in case there is going to be any further development. Also, they have some other good stuffs like drama CDs and irl events announcements.