Billie Piper’s return to Doctor Who would be incredible, though it would almost be like opening Pandora’s Box if she reprised her role as Rose Tyler.
An announcement of Piper’s return would almost certainly spark speculation that Tennant could be returning, which would be even more monumental news.
Before we get all wrapped up in speculation, though, let’s leave it at: there’s no confirmation Piper will return to Doctor Who in future seasons, even if she’s interested in doing so.
Rose is presumably still living out her days in a parallel universe with a human clone of the 10th Doctor, played by non-cloned actor David Tennant.