I think it's too early to be assuming the runner up winner of the EPL title this season, I would've said it going to be Man City turn again this tournament but it's a different story for the cityzens from the start of the league, they are actually distabilised and it's going to take them time to rearrange themselves back again.
If Arsenal can put more effort to winning almost all their games, it would def disrupt Liverpool progress and put them on shady mood.
Liverpool are almost certain to be the Premier League champions this season unless they lose badly like Manchester City or Chelsea. Liverpool are leading by a large margin and are performing well in every match.
However, it is difficult to predict which team will occupy the second place in the table. Arsenal are the favourites for the second place in the table. Nottingham Forest are playing quite well. However, I doubt whether this team can continue their good performance in the long run. Also, I would say that if City can recover their form then there is a big chance that we will see Manchester City in the second place in the table.