So after attending Absolute Battle, ECT, IPS, SCR and other tournaments after the patch and pretty much dropping most of my secondaries to put more time into Batman, this is what I think of his matchup chart now:
Aquaman 5-5 but Aquaman controls the pace of the match
Atrocitus 6-4
Bane 6-4 or 7-3
Batman 5-5 or 5.5-4.5 if it's my Batman
Black Adam 5-5
Black Canary 6-4
Blue Beetle 6-4 maybe 5-5
Captain Cold 5-5 or possible 4-6
Catwoman 5-5
Cheetah 6-4 or 7-3
Cyborg 6-4
Darkseid 5-5
Deadshot 4-6
Doctor Fate 5-5 or maybe 4-6
Firestorm 5-5
Flash 5-5 but Batman controls the pace of the match
Gorilla Grodd 6-4
Green Arrow 4-6
Green Lantern 5-5 or possible 6-4
Harley Quinn 4-6 could maybe be 5-5
Joker basically 0 matchup experience but considering their tools I'd assume Batman wins
Poison Ivy 6-4
Red Hood 4-6 this is Batmans hardest matchup in my opinion, he zones out Batman and he punishes B23 on block with lunge
Robin 6-4
Scarecrow 6-4
Starfire 5-5
Sub Zero 6-4
Supergirl 5-5 or possible 4-6, she def controls the pace of the match and her quick lasers get rid of Batman's trait easily. Threat of teleport and quick lasers doesn't let Batman zone and D2 keeps him from jumping in
Superman 6-4
Swamp Thing 6-4 or 7-3
Wonder Woman 5-5
Ask me any questions about any specific matchup if you want me to give details on why I gave it that number