I looked into the unused content of Help Wanted, and I discovered that Pizza Party was meant to be different. Instead of Glitchtrap wanting the player to follow him, it was Spring Bonnie, and once you are on stage, there is an audience of plushies rather than that glitchy rabbit dancing.
Honestly, I'd prefer the old one more, as it brings in more creepy value. The end of Pizza Party is meant to be based on the missing children incident, and with Spring Bonnie reimplemented, along with the plush audience, then it will be clear as day that, this is based on the incident (Like, imagine seeing Spring Bonnie with human like movements.)
If I were to implement that, then I think this will be how Pizza Party's ending will play out after the Trapped Ending. I mean, canonically, Help Wanted, despite it being a game in canon, is in beta testing in canon.