I hope for your sake, Alonso doesn't play them in those positions, because it would be severly imbalanced.
Firstly, Bellingham as a trequartista negates one of his best skills, dribbling/ball carrying. You'd be playing him like a deep target man trying to get Mbappe/Vinicius Jr playing off him, as colossal waste of talent.
Then you'd be playing either Mbappe/Vinicis Jr out of position as a RW, another massive waste of talent which will hinder the team, with neither player likely to want to be played out of position.
Lastly, Guler will become Ozil mk II. You really don't want to waste his potential playing him as a CM, when his skills don't lend themselves particularly well. Especially when you already have a world class CM playing as a false 9.
An all round waste of world class talent.