First to clarify we are talking about the writer not the director. The director in those shows doesnt really has a say in what happens storywise.
And yeah it is pretty likely that something like that could happen during the end of the show. I remind you that this is a thing Kobayashi is famous for because she did it in every single one of the toku shows she has written.
No urobutchi has not went that route but he still has tons of stuff in the show he did in madoka the humans turning into the monsters they fight is only one example of those.

BUT I dont think Kobayashi will go that route at least for this show since she averted her other major trope. In all of her Sentai shows the sixth ranger or sixth ranger esque character is connected to the past of one of the other team members. And that didnt happen this time. Akira has no known past connection to any of the other ToQGer.

So while its likely she could do the Evil/Other Red Ranger thing I dont think she will. The whole show has made it clear that it wants to avert expectations and take classic Sentai tropes and completely turn them on their heads.

Y'know, if we take into account ToQGer's color swapping gimmick, we technichally have five Red Rangers. :p

:lol

Well this was my first episode of ToQGer and I thoroughly enjoyed it. A lot of the things that bothered me and kept me from watching it, didn't bother me at all. ToQ 6 is very interesting and awesome. Right reminded me of Shouichi from Agito so that's pretty cool. ToQ 2 is pretty cool reminds me of kind of Ziggy a little. ToQ 4 reminds me of Micchy before he became a traitorous bastard. I didn't get much from the girls, but Wagon, The Conductor and Ticket are really fun. Zed is really intriguing, and Schwarz reminds me of Dogold a bit so he's interesting too. I'm probably going to go back and watch the previous episodes but I like it right now.

Something just hit me.

Zaram - Used to be a Shadow Monster
Utchy - Once possessed by Dogold

They both use a similar weapon to. Swords that have opening compartment where you can insert a power-up. Battery and the Drill Ressha.

Yup.

The Shadow Line also has simular motivations as the Deboss and both gather human emotions to fufill their goals.