What's going on with The Dark Tower?

Depending on who you talk to, a filmed adaptation of Stephen King's Dark Tower is still happening but in what form and with what filmmakers is unknown.
It's on. It's off. Javier Bardem is playing the gunslinger. Or he's not.
 Here's a Deadline Hollywood story with the latest, which seems to be that it's still alive with Ted backer MRC investigating the possibility of financing it.