"More rumours, today some newspaper published that The Cure could be the major act in this year's edition of Cumbre Tajín Mexico. The next day, 16th January the line-up & date will be revealed." (Thanks Jorge and @IvanGallardo34)
This one really seems like nothing more than speculation, but at least we don't have long to wait and see if there's any truth to it.
Update: And to no one's surprise, the announcements have been, and no Cure.