The real reason Galvatron wasn’t in “The Last Knight” was because he got fired for hugging the Mini-Dinobots (We all know they’re babies really) too much and not actually playing his role.
Often yelling “FUCK YOU, THEY’RE CUTE” whenever anyone tried to get him to stop.

No but seriously, I’ve thought about NanCee as a legit ship.

Under the cut ‘cos this goes LONG

Hear me out,
Nancy is basically a recolour of the Lithone females right?
So Nancy is actually a Lithonian!

She survived damaged and traumatized on a tiny piece of debris that didn’t get sucked into Unicron’s maw.
She drifted through space before ending up on Junkion, now while wary of new people the Junkions were warming up a lot thanks to the Autobots, not to mention at this point Nancy was too weak to speak so the Junkions immediately took this poor lost soul in.
This leads to Nancy living on Junkion where, aware of what happened to Lithone, the Junkions treat her with the utmost respect and do their best to help her as much as possible. Naturally this leads to her living with and being looked after by their leader, Wreck-Gar, a lot as he wants to make sure his guest is getting the best treatment (Hence why she was sitting with him in her one appearance).

Now the shipping part, honestly NanCee is gonna be a canon ship in my “Shatterverse” so there’ll be references to that but GOSH DANGIT HERE WE GO.

Nancy ends up going to Cybertron more as Wreck-Gar does, she gets welcomed by everyone and is enjoying her time here now on the war-free peaceful planet.

Nancy then gets awkwardly shoved onto one of the other few femme’s there.
This is where she meets Arcee.
Arcee who is initially a bit peeved at her being dropped on her doorstep like “I expected this kind of awkward stupidity from Rodimus but he’s not Prime anymore and neither were you Magnus! Why are you just dumping her on me!?”

So this leads to Nancy always being at Arcee’s place, and while initially scared of her Nancy warms up to Arcee when she starts asking nicer (not her fault the others are morons). Arcee gives her all the essentials she might have missed while living on a planet of literal Junk (Like a nice clean bath) and easily identifies her as not-a-transformer.
Yet she really can’t ask because Nancy breaks down when Arcee asks where her “real home” is.
She also gets an idea of what might have happened when Nancy begins getting very stressed at seeing Unicron’s orbiting head (She doesn’t know it’s Unicron as she has no idea he could transform but it’s still causing her to anxiety and such).

Arcee, after learning fully about Lithone, realises she needs to do something to help her. She knows the Junkions would have tried their best but it clearly wasn’t enough.
She ends up getting Kup and others to help Nancy, Kup surprisingly even brings Cyclonus along to this as he actually has a wealth of knowledge on how to help with something like this.
Together they all start on a process to help Nancy as much as possible.

Perceptor chats science with her and shows off some fun things.
Arcee goes out of her way to find Lithonian items and artifacts for her.
Kup tells her stories of places he’s been for her entertainment.
Therapeutic Oil cake baking with Galvatron is always a laugh.
Watching aerial displays with Cyclonus and the other fliers.
Arcee is even installing curtains on every window that Unicron’s orbiting head can be viewed from so she doesn’t need to see him.

Nancy is thoroughly enjoying all of this, she bawled her optics out when she was first given a surviving 

Lithone fairy-tale book from a galactic library and is floored by all the effort everyone is going through just for her.
It was like first arriving on Junkion but much more intense and personalized.

Nancy is content to curl up asleep next to Arcee on the couch eventually.

Oh no…” is all that ran through Arcee’s processor at that one moment.

The Junkions offered to take Nancy back to Junkion one time, despite their leader’s now-frequent visits.

Arcee found herself behaving most stupidly, wrapping her arms around Nancy’s shoulder plates and curling her lip plates in a protective glaring snarl, but trying not to force Nancy to stay (That’d just be selfish but damnit she doesn’t want her to go she doesn’t want her to leave).

She pretends (badly) not to be ecstatic that Nancy votes to stay.
Something the Junkions are fine with and proceed to move her belongings from Junkion to Cybertron for her.

Now it’s just Arcee trying to pretend she’s not head-over-heel joints for the Lithonian, practically to the point of rolling up on a motorbike in a leather jacket going “Get on nerd were going shopping” she’s trying so hard to play it off cool.

Nancy is no fool and of course the deceptively strong pink femme has wooed her, through good looks, being a dang babe and goddang considerate to her needs and feelings.

So there, they’re the god dang gorgeous babes that utterly hooked up.

They also adopt an adorable pink race-car youngling/newspark and raise him like the loving best moms they are.

Another great thing in AU’s is how something that was meant to be a one-off thing becomes so great/fun that it begins to crop up in all/most of your AUs.

Which is pretty much why Cyclonus has parents in most/all of my AU’s.
They’re adorable.