Here is a game taken from BlueSky.
The showrunner comes to you asking for a script for a Doctor Who anniversary special. They want a multi Doctor story, you need:
A Doctor
Another Doctor
An extra companion
A villain
Mine is:
My mind is irrevocably damaged.
I totally saw that first picture as @MrColdStream 
I was going to say the same thing
Same for me 
Yes! You are my loyal subjects, and you will bow before Lord Coldstream!
It turns out that using that picture of me/my alternate incarnation, the Eleventh Doctor, was a bad idea!
When you first made that meme, it took me a moment to work out why Matt Smith didn’t quite look right.
(Oh it’s all going off topic already!)
I would 100% want Paul McGann to get some more screen time so I’d have the Fifteenth Doctor meet the Eighth. Susan would be the companion, they would go back and get her. I think that would be a fitting anniversary.
I guess the villain would be the Daleks, as they are the reason Susan stayed behind. But I’d like to do something different with them!
13
meets
Six
And the extra companion is
Bill and Nardole (oh come on, it isn’t cheating if it had to happen!)
VS
Good snake Master!
I’ll come up with a plot later.
Eight and Eleven.
Liv and Valerie.
Sontarans
Two and Eleven
Jamie and Amy
Yeti
Are we just doing Haiku now? 
Just reminded me of some (pretty bad) Doctor Who haikus I made years ago!
Timeless doctors merge,
Eighth and Fifteenth seek Susan,
Daleks loom once more.
The Daleks are Coming
By a young, innocent DontBlink
In their metal shell
They will exterminate you
They are the Daleks
There is also a crude illustration to accompany this ‘wonderful’ haiku, plus a Slithern related one that’s even worse.
Fugitive Doctor,
Lucie and Eighth in a Shed,
Drashigs! Danger! Run!
Literally something Big Finish would do.
This is totally off topic (I know, what’s new) but when I played Animal Crossing during the pandemic I wrote a new Haiku about what I’d done each day and it was just so wholesome! 
Lovely Ideas that I see here, personally my one idea that would be this:
Doctors: Fugitive & Three
Companion(s? I mean, hey, if most here can have two, then I can too!): Karvanista and Jo
Villain: Animus
Story: The Fugitive Doctor and Karvanista get trapped on Vortis and send out a distress signal, only to be greeted by Jo & Three.
Okay, so here’s my pitch for the 100th anniversary!
The Eighth Doctor (the Ghost of Paul McGann) and the Ninth Doctor (the Ghost of Chris Eccleston) join forces with Doom (Sooz Kempner) to tackle a mysterious being, known only as Coldstream, who spreads the belief that everything is a bad idea across time and space. But is Coldstream the Doctor, the Valeyard, the Master, or someone else entirely? And will he infect the Doctors mind so that the past will altered and the Doctor will enver leave Gallifrey, beliveing it to be a bad idea?
Tune in to BBC Zero on November 23rd, 2063 to find out!
