Regeneration Speculation: Could Jodie Whittaker Really Regenerate into David Tennant?

Soon (I can’t be more specific as the BBC still hasn’t released a date and time), Jodie Whittaker’s Thirteenth Doctor will regenerate in “The Power of the Doctor,” her final special airing as part of the BBC’s Centenary Celebration.  Months ago Ncuti Gatwa was announced as the Fourteenth Doctor with Russell T Davies returning as the Doctor Who showrunner.  Just seven days later David Tennant and Catherine Tate’s return was also announced as part of a trio of specials for Doctor Who’s 60^th anniversary.  Speculation began immediately.  Was this a missing Tenth Doctor and Donna Noble adventure?  Was this an alternate universe?  Or could it be possible – could it really be possible – Jodie Whittaker’s Thirteenth Doctor would regenerate into David Tennant’s Tenth (or Fourteenth?) Doctor before then regenerating into Ncuti Gatwa’s Doctor?  The latter two theories were first born from David Tennant wearing a suit and coat he never wore as the Tenth Doctor.  With weeks (or days??) until “The Power of the Doctor” airs, I figured it’d be fun to write a li’l speculative piece about all this :D.