Even though the doll is still here, the timeline has certainly been altered (the Delorean man was from an alternative timeline so he influenced Mike’s timeline to be like this[hushed up conspiracy])
Mike was still confused as to what happened last night, so Mike went to see Chester to find out if last night Chester spiked his drink or something.
Thn Mike realized the band had become what he didn’t want it to be:
Mike: “Who’s that biatch, Chaz?”
Chester (alternate timeline): “Who the fuck are you??? Fuck Off!”
Same thing with Mike’s father: Mike’s Father doesn’t seem to recognize him, ignoring him