If that happens, likely same result over and over again with the squad they have. Don't want to give too much head on United. With that squad they don't seem like a big team in the current race. They have just won one match out of 3 and that too was against Brighton and they nearly had them in that.
Mind you that Manchester City have also won one match this season, against a struggling Wolves side, but they are still seen as one of the favorites for the epl title, that being said, I don't also think Manchester United can win the premier league just yet, but I don't think they'll fall out of the top four this season, except their bad run of form continues deep into the season, and teams like Everton, Arsenal and Chelsea have a good season.
Imo, OGS would not be sacked till the end of this season, if he stays or leaves old Trafford will depend on where Manchester United finish in the table, obviously it already looks impossible for them to win the league, so it's yet to be seen if the hierarchy at United will be happy with a top four finish yet again and give ole another year as head coach of Manchester United or change their manager.