They've also got Cogman who is a British car.

 

I don't think the red car will be Windblade despite how much Hasbro wants to push her. Mainly because her name wouldn't make sense as a car. Though if it turns out the car is a triple-changer then, yeah I can see it as Windblade since her jet form would most likely be CGI like Drift's in AOE.

 

Not to mention that they've already got a Samurai Autobot already.

 

It's not out of the realm of possibility. In AOE they took the OshKosh Tactictal Truck, made it look a hell of alot like Bulkhead and called him Hound. Last I checked, Hound was a military Jeep.
They also made Sideswipe a Corvette, Bee a Camaro, Crosshairs a Corvette, Arcee a triplet motorcycle, Soundwave a Mercedes and Drift a triple changer.
This is Bayverse, where name slapping is pretty much the norm.

That being said, my guess is that if the McLaren is a Femme Autobot:
Override
Flare Up
Moon Racer
Firestar
Lancer (because the name sounds medieval)
Windblade
Chromia

You also have the more unlikely

Dust Up
Jumpstream

I also wouldn't put it past the Bay crew to give her a recognizable Mech name, like Mirage ( yes, I know there's Dino but I've always thought of Dino and Que as their own standalone characters, like Jolt)

 

Don't forget Elita-One since we aren't crossing out the realm of the possibility that since Arcee's components were never credited as Elita-One and Chromia and we know that both the comics and the toy bios aren't canon to the movies (otherwise Lockdown would be a Decepticon and that would contradict the film), there's a chance they can still appear.

But of course the chances are quite slim and that's why I'm only talking from just some form pf speculation rather than predictions.

 

Between the Red car and Cogman, I would definitely like to see at least one of them as a Medieval Knight in armor in robot mode.

 

I'm all for the McLaren being Elita-One or Chromia. I always thought that the idea of making Arcee a femme with two component bots, was ridiculous.

 

Yeah, he's definitely frightening! Ha-ha, I feel that I also want to gush many words, but about Bumblebee  He so inspired me!
Can't resist to repeat, it's so incredibly how they (TFs) are different! They all have totally different "voices" and drive in different ways. Barricade has very low, guttural roar and drives straight forward, like an infuriated beast Bumblebee is also sooo loud, but his voice is much higher, shorter and in general he acts provocative, bold and confidently, like it's all not dangerous, but just fun  I think we'll get a lot of his characterisation! I'll never forget the scene, when he scared people on square by abrupt drifting. Just handsome! Seriously, in this rainy weather he was like a sun, so bright, courage and full of life! But the most loud from them is Hot Rod  Once I was standing at him when they uncover the Lamborghini, driver sat behind the wheel and suddenly there was a very loud and sharp, shrill buzzing sound, I even almost jumped on the spot  I also have seen Bumblebee racing with him at the Gherkin skyscrapper at 60 mph, they drove really very close and Bumblebee was always one step ahead! McLaren is very brist and fast, has quite deep voice, but not very loud and almost without vibration. I think Lady and Cogman are just nicknames and mean nothing. And by the way now when I'm seeing black Lexus I always look at it in disbelief 
I forgot to say that places at Gherkin was very mysterious for me, because I didn't see much, but Mark Wahlberg and Laura Haddock was there and there was many pyrotechnics cars!
My God, usually I don't know so much about the film before release, but now I feel that all events are just around the corner and already have became a big part of my life!

 

I would love it to be Arcee and have Susan Blu voice her...

 

I am dividing a lot of people because everyone I know is a massive Bumblebee fan and I *whispers* want Barricade to win ahhhhh haha, I know he won't but I hope it's a really impressive rematch from what happened in TF1. I wonder if his buddy Hot Rod is going to have to help him win this time? But yeah, the method of driving was the most interesting part of filming, seeing characterisation be given to plain cars. It's a really nice detail that may not be obvious in the final cut. It makes you appreciate the work that goes into movies like this a lot more, just like looking at the credits and finally understanding the huge amount of work every little name on the list put into it.

I'm so curious to see how the scenes are going to be edited together. It's a pity Russian Fan and I can't watch it together because I have a feeling it's all going to be a huge fight scene in central London and I was there for one half of the filming and them for the other half I think! Ugh, I sure hope it arrives soon and there aren't any delays to release.

I will personally find it really funny if it turns out the McLaren isn't based on an existing TF and is literally just called The Lady though, funnier still if we're speculating if it's a he/she and it's just a normal car, that would be a right plot twist! And same, someone close to me has bought a new black Lexus and it's weird seeing it roll around without TRF written on it. I wonder if he'll watch the movie when it comes out.

I would LOVE LOVE a medieval knight TF somewhere! Perhaps a seeker who's been there since King Arthur times. Ugh, you're making me want to do concept art and with chainmail and a longbow and end up adding it to my pile of already unfinished TF art -_____-

 

While I'm pro-Autobot, I absolutely love Barricade. Nothing against Bee, but I would really like to see Barricade kick his aft for once, even if it's just a short lived victory.

 

Does everyone seem to forget Road Rage? ;~; Also, what about Flamewar? Those are two other femme names they could use for the McLaren.