Spurs may be dangerous next season but by and large they will again be fighting for 4th place and if United get things right the competition will be even tougher than this season. And then there is Newcastle, which has the potential to fly very high. The Premier League is becoming a very tight league 
Why do you think spurs will be fighting for 4th position, I disagree with you because Tottenham Hotspur are going to improve more and they have what it takes to fight for second and or even for the first position, I think Antonio Conte believe in these also, he has almost complete the signing of Bastonni and Ivan perisic which are fantastic players I think he we get a good creative midfielder and Autaro Martinez and let's not forget that Tottenham have a world class team already that involves Harry Kane and Son with the inclusion of kulusevski and Christian Romero's so what are you saying.I think that next season there will be two undeniable leaders - City and Liverpool (as for City, this bag, due to its endless purchases, turns into a monster that just scares) and the group that will fight for the "leftovers" - United, Arsenal, Tottenham, Chelsea. Plus, there is always the possibility of lifting some kind of underdog (Leicester, Newcastle - why not?) But even without them, these are 6 teams for 4 possible places - that is, even if all 6 teams are incredibly good and show brilliant football, someone will still end up in 6th place and the season will turn out to be a failure. I hope you understand my point - with such competition, the fight for 4th place does not mean that the club is bad, but that the rest are also strong. And of course, I understand that anything can happen, and for example City + Liverpool can take 5-6th place, and the second group of teams can be higher than them.