Big rumour that David Tennant will be returning for the 60th anniversary specials, however it is said he will be playing a brand new incarnation of The Doctor rather than reprising the role of the tenth.
https://www.dailyrecord.co.uk/entert...octor-26021748
Catherine Tate is also rumoured to return, but will be playing a different character and not Donna Noble
https://www.plymouthherald.co.uk/new...return-6547075