Astral's true ace, as it's the only Number he use on-screen that Yuma never use on-screen.
Unfortunately this card is clearly too strong for early Zexal world era, so in DL I think Astral will either have no ace card, or just share the base Hope with Yuma.
besides, this card is from the final duel in the series, so I don't think we'll going to see this card in DL for at least 2 or 3 years after Zexal world gets opened, depending on how fast Konami wants to go.
Actually Number 99 will be Astral's ace monster. Since Astral is not a playable character yet It'll just take some time to make it happen. Don't forget that Firewall Dragon is a very OP card and it's added to DL. We will have Shay and Varis added to the game soon and they both have very strong and OP cards that will be added to the game at least somewhere in the new box.