Two years after Tron: Legacy came out, the prequel TV series Tron: Uprising aired on Disney XD, but that only lasted a season.
In fact, the Tron franchise as a whole seems to be dormant.
In 2017, it was reported that Disney was considering making a Tron reboot instead starring Jared Leto, but that project hasn’t had any traction either.
Still, there is a Tron rollercoaster at Shanghai Disneyland and another one is being constructed for Disney World, so the franchise will at least still be somewhat in the public consciousness.