Sorta liberal translation, emphasis mine:
Director Anno said forcefully: "I'm in my mid-fifties, age when Hayao created Mononoke Hime. It is prime of life. A new work is also advancing. I'm working!"
"新しいもの" means literally "new thing".
So yeah, looks like Anno has already a non-eva project ongoing at some stage (probably pre-production). No one knows what exactly it is. Japanese fans immeaditly speculated it is the much talked about Nausicaa project but given other comments about Ghibli's current situation and Anno's current relationship to the studio I find that most unlikely.