But that logic is like saying Furious 7's big opening will affect Avengers. And Deadpool even in ultra best case scenario isn't a 100M opener which will leg it to 400M and stay in the top 5 till BvS.
BvS does not need to stay in the headlines all year, it needs to dominate press in March and open huge and then be a good leggy movie till Civil War.
TDK's huge opening did not affect IM's gross or the bump IM2 got on OW.
You're missing my point then, firstly, I'm not saying Furious 7 opening big will affect avengers number outright, I'm saying (to make the point) if Furious 7 opened at 209mill it would affect everything this year due to it being a massive unheard of avengers like event. Before that is misunderstood, I'm not talking about numbers literally bleeding into and affecting other openings or things like that. I'm talking about the levels of boosting that being the only girl talked about at the ball affords you. It helps or it hurts on even a miniscule level.
I'm not talking about deadpool staying at top five till bvs comes out, I'm talking about the simple difference between being the big massive first talked about film of the year(let alone cbm) and being the second one. The difference between being the first big antip movie released that year to a hungry audience starved for a non bomb in a winter season and being a big movie after the second coming of guardians. The measurable difference and nothing more. It exists, it may or may not even be that big a factor but it's there in either case.
As for this discussion about staying in the headlines all year vs just doing so when you are released...I'm pretty sure if BvS was the only event film to come out for the next ten years the point would be all the more clear. I assume you are talking about the box office theatrical run gross of the first month or so, because I'm talking about the mechanism that get's people to want to watch something in the dollar theaters, on dvd or the following year. "Being the most talked about movie of that year" and how that not only helps you for the next 10 months but how it also hurts your competition seeing as how they would have gotten more shine and spotlight had you not existed at all. This very year Avengers 2 benefits from not having a BvS event happen in march but rather get's to be the big event of the year leading in and out of it's theatrical run. It being touted as the only cbm game in town this year is already doing wonders for it.
Being titled the sequel to the only movie people can remember from the prior year goes along way to selling said sequel. Again the GotG example, it's sequel will possibly feel like the sequel to the biggest movie of 2014(though it wasn't).
As for how TDK affected the buzz of the IM films...I'd say they would have been bigger had the TDKT not existed. Just like how if MOS was the only cbm movie on the landscape right now it would no doubt be bigger. This is part of the advantage the Raimi spidey series had compared to releasing such things during this current landscape.
I'm mainly talking about the things that can affect your buzz and what buzz can in turn affect. Being the only one, has a different result than being 1 of 20, especially in the long game and into sequel marketing. Imagine if you will a world in which only one blockbuster was released every year. Safe to assume that film would get more buzz than in than in the current system no? Measuring such things is what I'm talking about and I said if Deadpool becomes some massive pop culture hit(I've seen longer shots do just as much) than it's something. Not saying it will happen, saying it could.
Being the 'only one' helped Sapranos in a way being a dope provocative cable show in todays landscape is a little more grueling, if anything you have to do more to stand out, rather generate buzz. And I'm not talking about fighting for ratings because two shows are on at the same time of day.