Indeed, as Damicci said, it's the same form. Probably, though, if you were going to say something like that (I'm guessing), you'd be saying it out of exasperation, like you've just got a lot of work piled on you or something. In that case, もう死ぬぞ!or 死んじゃうよ!(from 死んでしまう) or something like that I think would be better.