Sinestro-
Full screen is where he wants you. You can block his long distance grapple hold with standing block, which is advisable because his boulder is an overhead and cannot be blocked low. If you eat a boulder, he can meter burn it to juggle you and then you will become stuck in his full screen mixup with the grapple, which will give him time to charge his gimmick or do whatever he wants. Do not jump. Anticipate his fast forward projectiles but do not get carried away with reflect. If you manage to reflect, make it count and use meter to return an unblockable projectile, and go from there. You want to fight this fight mid screen and utilize soul crush as much as possible. Capitalize on any mistakes he makes. You can dash forward to avoid boulders, but the aim of this game is to avoid being full screen, do not jump, and block standing. Sinestro is a beast with his zoning, but so is Raven.
I'd consider this a 5-5 matchup at this time.
Nightwing-
His staff stance is deadly up close. Raven has very few options other than to backdash out of pressure. Attempting any strings will usually result in being poked out of it; he deals impressive damage too. You will mostly want to remain mid-screen to long distance from Nightwing, and play keepaway. Punish any jump ins or whiffed moves with a meter-burned Singularity for a full combo punish. Close-up fighting is his specialty, so again, dash away and maintain distance. Do not jump because he can still catch you with his staff. If he gets in, B23 him to initiate keepaway.
I'd consider this a 5.5-4.5 matchup at this time until I see more Escrima stuff.
Deathstroke-
His projectiles, even though they fire multiple times, can be reflected so make him respect the reflect and he'll be a bit more mindful. His meter-burned projectiles are NOT reflectable though and will inflict major damage if you allow yourself to get stuck. Just block them, dash forward to close enough distance to do a Soul Crush. Fortunately, it has so much range that you can make him respect that move and pressure with demon stance specials. I'd consider this a 5-5 matchup at this time.
Killer Frost-
Soul Crush is punishable mid-screen with Slide. Her ice daggers can be reflected. I still need to fight more Killer Frosts though. I didn't have a big problem against her.
Green Arrow-
His arrows are fast, so you have to anticipate that he'll start a zoning game with you and counter zone with reflect from the get go. You can keep him out with B23 and just Soul Crush him.