It’s all guesswork, but TPM got a new scan for the BD, so it’d be odd if they did another new scan a year later for it.
There’s nothing to scan. The movie was essentially “rebuilt” directly from the digital filmout tapes in 2011 (they were still readable after more than a decade) in preparation for the blu-ray and the 3D version. That rebuilt master is what they’ll be going back to from now on to make any new transfers of the film.