It ALL comes down to quality.
Sequels aren't solid earners - well, sequels are more and more just tossed out without a thought and in a rough economy people are becoming smarter with their money. IPs sell, but you also have to be smart about it and deliver it RIGHT.
There isn't enough hype - well, go out of the box and give people something they can truly be excited about. Hype still exists. Word of mouth still exists. Television proves that. DELIVER. Mad Max. Guardians of the Galaxy. Deadpool. Strikingly original films that built hype not because of the IP but because they felt original. If you deliver quality, you get quality results. Give the people something to talk about. Don't complain and blame IPs when you do it wrong, others are doing the same and because they're focused on quality soaring because of it.
TV is over shadowing film because TV is better - that all comes down to quality, TV is only better because film quality is lower. If the quality of films were higher, that would not be the case. TV by the way is more FRANCHISE built than film is by it's very nature, if it's successful there's more of it - if the franchise doesn't work then it gets cancelled. It lives and breathes based off of franchise thinking.
It's not that it's sequels. It's not that hype no longer exists. It's not that film can't match and rival TV. If it was things being franchises - Walking Dead, Game of Thrones, American Horror Story, hell going newer Mr. ROBOT would all be sinking as well since they're ran off of a very similar way of thinking. Franchise thinking is just giving you more of what you've shown you already like, season 2 has the same thought processes as sequel 2 (or rather sequel 9 due to expanded time TV has vs film). Those are all, every single one of those points, SYMPTOMS of a decline in quality.
In short, all of these come down to QUALITY. The only outlier that is also doing it in is backwards thinking with release dates - cramming rather than letting them have breathing room.