Kabal would suck up close, but his zoning would be stupid with the slow walk speeds and lack of dash cancels. Basically take Cyborg, and give him faster instant-air projectiles, buzzsaw & MB Cat Dash (the equivalent of EX nomad dash), and you get the idea. Every time he hits you with Nomad Dash, he gets a free interactable throw. Plus when he's running away, he'll eventually put himself in the corner where there's an interactable for him to use. So he's going to be a huge nuisance.
If his meter building was buffed to Injustice-style meter building, he would be ton ten, but would get blown up by MMH, Raven, & other anti-zoning characters. However, he would 10-0 Grundy, Bane, Doomsday, and Lex because his standing 2~NDC loop would hit them crouching due to their huge hitboxes. Many setups that make the opponent wake-up backwards wouldn't work because buzzsaw starts behind Kabal. Keep in mind if Kabal keeps the rest of his MK9 mechanics he could breaker with 2 bars of meter, use the block button to stop side-switching shenanigans, he can dash cancel, & could X-ray at 3 bars. However he can't push block, MB f3/b3 (or regular f3/b3 for that matter), use trait, or have an invincible backdash.
It all depends on what percentage of his MK9 mechanics he retains & how much Injustice mechanics are added. However, if he gets Injustice meter building, but keeps everything else from MK9 (including the ability to break everyone's combos at two bars), he is top 10 for sure, maybe top 5. You just can't rush down.