Looking at it from other angle, we may be closing to a saturation of the market. I don't know if we want that.
If the GA stops being interested in them due to genre fatigue, they will stop being profitable and studios will drop them.
I'm really fearful of the genre not keeping its good health until IW1 and 2 arrive
If the product/films become more formulaic and more susceptible to spoilers and overhype then, yes. There will be fatigue. (I for one am feeling it, but I've been hanging out at SHH. I don't have the fresh perspective that I've had going into every other CBM.) What is up until IWs? AntMan, CA:CW, BP, CapMarvel, Dr. Strange, Gardians2? If each one brings something fresh (I expect this from Doc Strange, more than any of the others), then we'll be in good shape.
Just because The Russo brothers made one movie , everyone thinks they do a great job
They did a great job with TWS and I imagine they were awarded that gig based on previous successes. The director (director team in this case) has to have some sort of vision for a project and the administrative skills to get it done on time and on budget. And it probably helps that there are two of them. They had that and the skills to tell the story effectively. That's why TWS was a good movie. The story was well developed, the characters felt right, the storytelling flowed well and the action was tight. I also found the score -- while not distinctive in a stand-alone sense -- to be quite dynamic and fitting. They obviously have faith in the Russos (and I'm sure also in Marcus/McFreely). At the very least, I think Cap is in good hands.
That's exactly the problem. A few bad films will sour the GA and expedite the over saturation. If Fox keeps up with DOFP in terms of quality then we're in good shape. If Deadpool is a breath of fresh air then the genre as a whole will reap the benefits. But if Fantastic Four sucks then it's going to be a big dent in genre as a whole. This is why I'm glad Marvel stepped in and de-railed Sony's plans for Sinister Six, Venom, and Aunt May (if that was ever serious at all). The need to produce a Marvel film every ten years to retain the rights accelerates this problem as well.
Above CBM genre fatigue I fear people may start getting franchise fatigue as well. Hunger Games is about to close in on their fourth movie, Transformers working on its fifth, Sony wants to push a shared Ghostbusters universe, Universal wants to make a shared Monsters universe, Harry Potter had eight films and now is getting at least one spin-off, and now besides the main episodic Star Wars installments we're getting Star Wars spin-offs there as well. While I'm looking forward to some of these films a lot of them just seem like overkill. Everybody is so desperate to duplicate Marvel's model or to force a franchise juggernaut down our throats, and that's accelerating us towards the point of diminishing returns. I think a day may come where the GA longs for more one-off films and originality.
Ha ha! Aunt May, indeed. (everytime the AMC Movie talk gang talk about it, I have to change my underwear.) It is the branding of every movie series as a "Universe" that may be the biggest factor in generating CBM/franchise fatigue. At some point the pendulum will start swinging in another direction. That's only to be expected.
I do think, though, that IWs could be the end of the Avengers franchise proper. If there is any juice left in the Universe after 2020, it's likely to be solo franchises, standalones, or standa-alone team up movies (where, as in Guardians, the whole team is the character with no need for multi-film build up.)