There’s going to be some spoilers for the Mandalorian season 2 finale, so you’ve been warned.
With the wrap up of season 2 of the Mandalorian we’ve seen Grogu (aka Baby Yoda) go off with Luke Skywalker. So in season 2 we learned that he was a Jedi youngling when Anakin slaughtered them, and now he’s going off with Luke to be trained, presumably alongside Ben Solo (the future Kyle Ren).
That is a lot of darkness surrounding the cute and cuddly character. He doesn’t have a great start—through no fault of his own— to a life as a Jedi. In addition to all of that there is clearly a conflict in him, one that we have seen before in Star Wars, that of emotional attachment. These elements, personally make me want to see Grogu be a Gray Jedi.

We’ve seen Gray Jedi before, but we’ve also seen people who would probably have been better if they hadn’t fought their nature, like Anakin. Emotional attachment is such a fundamental conflict within Star Wars, and I think letting Grogu handle that in a less binary more healthy manner will be cool.
When 900 Years OldYou Reach, Look This Good You Will Not

In addition to wanting to see Grogu go the way of a Gray Jedi, I also think he gives the storytellers an interesting opportunity to anchor the future Star Wars (both our future but also the stuff happening after the original trilogy) within the canon.
Yoda’s species ages at such a slow rate, that they have an opportunity to oversee or participate in such a wide range of generations. Grogu is years younger than Anakin (maybe fifteen) all the way through The Rise of Skywalker and he’d be the equivalent of a preteen?
Grogu can stand beside the Jedi that Rey trains, and the Jedi they train. It’s not to say that I want him to be a Yoda, where he is the wisest, and know so much about the Jedi order, but I think having a character who can come in and out of the different Jedi stories will help to keep Star Wars feeling connected in the wake of the Skywalker Saga ending.
Should Grogu get his own movie?
I’m not fully opposed to this, but I’m not sure it’s the way to go either, but if we’re going to get Grogu as a main character—and I’m assuming he’ll learn English as he grows older— I have a couple of ideas for who I want in charge of it.

Taika Waititi is one of my personal favorite filmmakers right now. He directed Thor: Ragnarok, taking the Thor franchise to a place I never thought it would be, and I loved it. Next he directed Jojo Rabbit, which you haven’t seen it is one of the best films of 2019, about a boy and his imaginary friend Hitler, in which he tells an endearing story of a young nazi during WWII.
The reason I bring up these two projects, is to say that Taika Waititi can take very weird concepts and make them great, because he understands storytelling, and isn’t afraid to dive into the odd. If we’re ever going to get a Grogu movie, I can’t really imagine it won’t be the weirdest Star Wars film to date.
I know that Patty Jenkin’s Rogue Squadron was the big film takeaway from last week’s Star Wars announcements, but we know that Taika Waititi is also going to be directing a Star Wars film, and while there has been little to know information on it, the one consistent thing people have been saying is that it’s going to be weird and different.

My last point in arguing for Taika’s take on Grogu, and is that he’s directed an episode of The Mandalorian, he’s already in someway connected not only with Star Wars, but with this character.
We’ve Never Had a Real Gray Jedi

This is going to be a controversial point, because there is some speculation that Qui-Gon was a Gray Jedi, or that Kanan was. But the only real confirmed Gray Jedi we’ve seen have come in books and video games. Never a show, never a film. It’s an aspect of the story that is open for expanding the lore for the audience that only watches Star Wars.
Like I said before, Gray Jedi make the most sense in a lot of ways, they’re not good or bad, but rather they’re balanced. It’s something which in a series always so concerned about balance, has been sorely lacking, especially when we have so many balanced non-force wielders. With Lando, and Han, and Hando—just now realizing what they did there with his name— we see good characters with bad sides, and bad characters with good sides. Even within this season of the Mandalorian, we see Boba Fett, who is a bounty hunter help to do the right thing due to his honor code, and then presumably become a crime-boss.

Nuance is lacking in the force, and Grogu the Gray would be a great way of introducing it. That’s what I want to see.