Shall we release the EXTENDED cut of Ellie's singing?

You guys were mentioning Susan Twist in such an official capacity that I honestly didn't realize until this video that that was the actress'

I can’t help thinking that Mrs Flood is more likely to be Susan than Susan twist…..

I appreciated the Once More with Feeling reference.

Interesting with the Susan Foreman theory considering Susan was explicitly called out in the second episode of the new season, when they time travelled to 1963 and said she lives just over there a few dozen buildings over.

Based on absolutely nothing, I think Susan Twist is actually "the one who waits" and that she represents television, in the same way the Toymaker represents games and Maestro represents music. All three representing forms of entertainment. That would form a Triad.

I am going to double down. Susan Twist is playing "The Doctors Daughter" And Ruby is Susan. The Doctor's Grand Daughter

I think your theory is near spot on, Except I believe that Susan Foreman is Ruby's grandmother, and Susan Twists' characters are Susan's daughter/Ruby's mother who is trying to lure the Doctor back based off of stories told to her by Susan Foreman. Crazy but just crazy enough to work

If susan returns , I will cry like a baby

With so much emphasis on The Doctor & Ruby's status as orphans, it makes sense to have a Twist as part of the proceedings.

**my theory from the first time we saw Ruby**

A Once More With Feeling gag? Fantastic!

With the show finally mentioning Susan again in the Devil’s Chord episode, this theory has a lot of merit

I feel like if Susan is returning, Susan Twist is a red herring. He's cheeky enough to make Susan Twist play Susan, but he's also clever enough to know that we know he's cheeky enough to do that.

There is always a twist at the end

I think that could work, and it opens up the Valeyard (who i assumed might be Twist or the Mother) for being the secret big bad. After all, who would the Toymaker fear more than an Evil Doctor?

In 1994, there was an edition of a spoof documentary series on BBC radio called Whatever Happened to...? One episode of this was dedicated to Susan Foreman. Now, it's not canon in any way, but RTD would have been more than aware of it. I suspect his comment was a reference to that rather than any great reveal regarding Ruby. I'm happy to be proved wrong, though.

I understand Ellie’s stance on River but I still genuinely want nothing more than for Jonathan Groff to secretly be playing River. How did they get out of the library computer? How did they get their regenerations back? Honestly I don’t care, I just want to see how angry it would make everyone.

Unless they bring back Carol Anne ford for an episode and show her regenerating into Susan twist she’s not Susan, Carol Anne is still alive and would be playing Susan if she came back

My theory isn't about Susan, but I think Mrs Flood's identity might have been taken over by a Zygon.