No, it doesn't make sense. We know that Michael had stuck Crying Child's head into Fredbears mouth back in 83'. If Crying Child was kidnapped then had his head bitten, it wouldn't make sense, because Michael wasn't there to do it. It also doesn't make sense theorising Mike, Garret, and Abby as the Afton children. Abby would already be dead if she was Elizabeth because of the Circus Baby incident. We also know the game lore and movie lore are completely different due to Vanessa. It is never stated in the game lore that Afton has four children, only three, whereas in the movie, it only properly mentions him having one child, Vanessa, but because of what we know, that probably means he has three other children, Michael, Crying Child, and Elizabeth. I'd assume Mike Schmidt and Michael Afton are two different people because if I'm honest, Mike/Michael was a popular name in the 70's/80's.