I really want to think Henshin had massive struggles and they had to quit the project because of it. However, as said, "with us at least" really suggests there's (or there will be) another studio that will continue the work.
We could think about a lot of studios that could be the ones diong this project. But as it stands, this is horrible news now. But maybe, as the year continues, they can become great news. I still have faith, but I can see the movie being released in cinemas, if everything goes OK by this point, like being greenlit soon and starting production, as early as 2023.
My hope of getting good news soon is very low though. As long as it isn't officially cancelled I will still have a little bit of hope.