I think it's really going to come down to who wins the current scrap for CL places; this is going to set the tone for the next 5 or 6 years. However, there are some distinct advantages, for some clubs...
Man City and Chelsea will both buy large in the summer, of that I assure you. Their seasons are over, aside from perhaps an FA Cup run, and securing their place in the Top 3-4, which for Man City at least is looking comfortable. But here's the thing; even before their spending spree, these guys have the likes of Mata, Silva, Aguero, Hazard, Oscar, Kompany, Toure, Nasri, Luiz, Ramires, Hart, Zabaletta, Cech and Courtois.
These are not weak teams. They are, however, teams in need of a couple of key elements to raise their game to the very elite level. Expect both of them to be active in bringing top-quality strikers and some defensive security. Maybe even some more magic in midfield, for City; I'd not be surprised if I saw them go in for Isco as well as someone like Falcao.
Also factor in that they well be poaching from whoever does not make the cut, such as Suarez, Cabaye, or Fellaini...
Arsenal and Tottenham are the two most complete teams, out of the rest of the pack. Both of them are well put-together, and have been assembled moderately expensively, but also with purpose. They're both very good teams as well as being a good collection of players. But here's the thing; they don't have the cash of City or Chelsea to ensure their survival in this race.
If Tottenham miss out on CL football for another season (or two), then Bale etc are on their way abroad. If they do get CL football, then the team is good enough to attract real high-quality talent from across the continent, and talents like Bale have less reason to depart; if all goes well, they could be fighting for the title as early as next year, but two would be the more conservative estimate.
But the same can be said of Arsenal. Despite all the woes Arsenal are enduring, they've also got some good reasons to be cheerful, too. Cazorla has been a revelation for them, Walcott is becoming more complete every season, Wilshire has a stellar future, and there's good, young talent in every department. If they hang on to CL football, they can continue to grow their team following the turnover of Fabregas, Song, RVP and Clichy, and they are financially very stable, thanks to how the board have managed the Emirates stadium project.
However, if they lose their place in the CL, then expect in a couple of seasons to see Walcott and Wilshire slip off to one of their richer competitors, or even following RVP's footsteps to Old Trafford. In which case it really would be ushering in an era of mid-table lounging.
Liverpool, Everton and Newcastle are a different kettle of fish, and for the first two at least, while it's a long shot, they'll be desperate for CL football, as they have the worst chances of hanging in the fight, if they don't. If Liverpool are stuck competing for the Europa League instead for another season, then Suarez is gone, Gerrard is old, and Liverpool will have nothing to replace them with. Coutinho is a nice, exciting prospect, and Rodgers has some lovely football being played, but unless it's enough to power them back to the Top 4, then they'll be stuck where Swansea is now; playing great, but just not good enough.
Everton face similar problems with Fellaini, and even Baines and Jelavic. Newcastle have a great team now, despite this season's form, and they may well chug along nicely as they click into gear, but you have to wonder if Ben Arfa and Cabaye would turn down an escape to a slightly better prospect, should they fail to make the grade for another season after this one.
tl;dr: These next couple of seasons will be crucial; our elite powerhouses of the next 5 or 6 years will emerge from this scrap, as the losers (whoever they may be) slip beneath them into a more tangible 2nd tier, and the hierarchy is solidified.
It's safe to say that Manchester United are going to win their 20th title this year. City are 12 points behind at this point and 3rd place Chelsea are 16. So it got me thinking, who do you guys think is going to be able to challenge Man U next year for the title? Will Man U dominate next season too? Is the premier league becoming more and more like La liga? Or will other teams beside Man City challenge for first place next season? If so, who and how?