Yeah, the official site leaked its effect.
Enmaryuu Red Daemons Abyss / Hot Red Dragon Archfiend Abyss
Level 9 DARK Dragon-Type Synchro Effect Monster
ATK 3200
DEF 2500
1 Tuner + 1 Dark Dragon-Type non-Tuner Synchro monster
The (1) and (2) effects of “Hot Red Dragon Archfiend Abyss” can each only be used once per turn.
(1) During either player’s turn: You can target 1 face-up card your opponent controls; that card’s effect is negated until the end of the turn.
(2) When this card inflicts battle damage to your opponent: You can target 1 {Tuner?} in your Graveyard; Special Summon that monster in Defense.
Note: Effects not 100% confirmed due to image quality.
