Call me crazy but I think Man City is gonna fall apart.
United were there for the taking last season but we blew it, they're not going to have a similar season again, certainly not with their new signings. In fact, if De Gea stays and they sign a quality striker, they might even be title contenders. Arsenal always somehow find their way to the top 4 so I don't expect them to drop down either. Chelsea are going to be champions again. So that leaves Man City. They have an aging squad and the players they've signed so far aren't going to move them forward. Sterling is too young to make a huge difference and Delph is an above average player. If they don't bring in more quality they'll be just one serious Aguero injury away from completely falling apart.
The transfer window is still open but if they plan on going through the season with what they currently have then I wouldn't be surprised if the table looks like this at the end:
1.Chelsea
2.Man United
3.Arsenal
4.Liverpool
5.Man City