"For those who completed UNDERTALE it's really important that you check @UNDERTALE 24 hours from now.
I want to make something new, and it all begins with your feedback.
A Windows PC/MacOSX PC is needed."
Just hope that means Undertale 2 or a new game from him isnt that far away, since this is looking less and less like an official new game reveal.
My (locked) thread about how difficulty should be a decision for the developers, not the gamers.