As for the premier league I think the title belongs to Liverpool because it has already been proved from from their consistent performance and the numbers of points that they have been able to achieve. The difference of points between Liverpool and arsenal is just 6, and arsenal can be unpredictable in their sometime and Liverpool is more consistent which I don't think if arsenal can be able to meet Liverpool. As for Nottingham, Chelsea and Manchester City struggling for the title of the league or getting to the top of the league, I don't think that will be possible because these teams are really far from Liverpool and arsenal in points.
It is certain that the Premier League champions will belong to Liverpool this season because if you look at the number of games left and the number of points that Liverpool have collected, it will be much more difficult for challengers to catch up. I doubt Arsenal because in the previous two seasons they have shown how difficult it is to win the Premier League title even though they were in first place before Man City took over that position.
Now they are in second place and maybe to catch up with the points that Liverpool have is much more difficult, especially to survive without losing or drawing is not something that is easy for Arsenal to do when facing a team that is much more balanced and the most likely to be achieved by Arsenal in second place.