They just released some pendulum monsters that are Gate Guardian supports. Of course Pendulum is not available, so they're gonna include: Priestess of the Gate (monster) and Ancient Gate of the Guardians (Field Spell)
Hopefully in future they upgrade Gate Guardian version more later a retain version of all three cards. Its only has 250 points up than Valkyrion. Plus it doesn't have any effect other than summon condition. The card just suck. Flat on stats and flat on its effect.
In the anime in that labyrinth duel, the Gate Guardian pieces were immobile until all 3 were summoned. I wouldn't be surprised if this is emulated as an ability by allowing you to summon Gate Guardian by sending its pieces from the hand (still terrible, but so is Weevil's Moth skill).