Of course, that doesn’t immediately disprove that Martin’s Doctor is from the future, but it looks like fans will have to wait and see what more is revealed about this new Doctor in Season 12 and beyond.
Chris Chibnall’s talk of adhering to canon could be an indicator that Jo Martin’s Doctor is from the past.
Some Doctor Who fans had speculated as much after she failed to identify the Sonic Screwdriver of Jodie Whittaker’s Doctor, which wasn’t always a part of the character’s list of tools.