Anybody wanna guess Gladion's team for the anime? Im going with
Umbreon
Silvally
Lycanroc
Crobat
Kommo-O
Golisipod
What are you guys thought's?
First off, welcome to Smogon!
Second, that's making a assumption that Gladion even has a full team in the anime or if he'll even need a full team. The direction of the Sun & Moon anime is, for a lack of a better word, aimless. A lot of the time its treated like a slice of life anime with occasionally battling. Because of this not many characters need more than a few Pokemon, especially without there being a standard Pokemon League for trainers wanting to train a full team.
Right now the Pokemon which we were shown Gladion had fits his character: Lycanroc Midnight, Umbreon, and Type: Null. And note he didn't have the previous two in the games. Whether they give him more or not I don't think is the question we should be asking about Gladion, but rather how is his story going to play out (and how differently will it be from the games).
The only trainer who we should speculate about future team members with is Ash since he'll probably be the only one getting a full team. Now we can speculate if the others will get any more, like Kiawe just got an Alolan Marowak so other characters are being allowed to catch Pokemon, but I have a feeling they won't have a full team of six.