Honestly as someone who has watched the show, I'd feel like just putting 1 Doctor and her companions disappointing. As my favorite doctors were 10 and 11. My fav companions were Rose and River.
But it's not my board and I don't post as much here. So it's up to you guys.
Plus as Chelle said you have had it like this in the past.
Yes Chelle the cast does tend to change. There's no telling when Jodie (the newest doctor) is going to leave the show. Usually the doctors last at least a couple years I think. And she was already in the most recent season and she's going to be in the one next year, but other than that I don't think there's any telling how much longer she'll last?
Companions tend to come and go as well.
I was going to suggest maybe adding the previous Doctors Sonic Screwdrivers but idk how that'd work.