It's an ending to be sure, but is it a good one? That's a matter of opinion, of course.
It does seem to cheapen the ending when this marketing tactic is used. Kawamori seems to be addicted using this for tv shows: SDF, 7 and frontier.
Also throughout the movie we were presented with multiple would-be-deaths but it would never turn out too be so bcuz kawamori is so afraid of finishing things off. I must say its starting to get annoying and unbelievable.
But I' guess I'm still going to watch it...