I don't have much knowledge on this Deathstroke, so you'll have to fill me in.
She could analyze Slade and would know everything about him
First, this belongs to Alpha Cammy, and since this match uses SFII-V Cammy, she doesn't have that power anymore.
Skill
Deathstroke has more experience out of sheer age, and from what I read he's got military training and his own self-taught fighting style, and he's considered the deadliest assassin in the world.
Cammy has less experience, but what basically engineered to be among the best assassins in the world too, and then went through another military training once she joined Delta Red. An advantage that she has, is her fighting style.
Now, I don't know how do Batman and whoever else Deathstroke has meet fight, but Cammy fights in an alien and unorthodox way, that doesn't resemble anything realistic and that Deathstroke might expect, know or counter (but I could be very well wrong). On top of standard martial arts, she rockets around along the ground, on walls, jumping at high speed changing direction in mid-air, with moves such as diving from above, sweeping the legs with her entire body, or leaping upward. Deathstroke could have serious difficulties in keeping track of her and aiming, and I don't know how much of an impediment it is, but him missing an eye increases his blind spots and make worsen the job.
Both are stealth masters, but given the battlefield being Central Park, it might be of little help, but both could exploit some more bushy areas, although I think it could play more in Cammy favor, given her agility and acrobatics which could take advantage of the trees, ever just to make it more difficult for Slade to track her, unless his enhanced senses can help spotting her.
Stats
As it was already said, Cammy's got a 2x advantage, and can boost some of her attacks with both Ki energy and Damage Boost. Her Delta Drive also makes her stronger, widening that AP gap, and faster, nullying the speed equalized (although not making this a blitz, since it's an unquantifiable boost) and worsening the situation for Slade according to the last paragraph.
On the other hand, Deathstroke has a quite big LS advantage, and unfortunately for her, many of Cammy's favorite techniques are based on snapping the opponent's limbs and neck, or slamming them down and putting them off balance, and none of those is gonna work on him and could turn against her, unless she stuns him first with, idk, a kick to the face, then goes for a throw, but that's highly situational.
Equipment
Slade clearly wins in this regard, staff, swords and guns given him the range advantage, and all the bombs work have great utility. Because of what I mentioned previously, Slade might have a really hard time aiming at her with guns and grappling claws, as well as landing bombs, but it doesn't take away the fact he's got quite a lot of useful weapons and tools to badly wound her or snatch some chance like stunning grenades, smoke or pulling her were his claw land on her (although she might even reverse the pull into a kick or a tackle, given her moveset)
Cammy has her bracelets, which are very sturdy and could help her parry some attacks, but seeing Slade pulling out weapons, she likely won't try to engage him head first. Cammy has shown to be able of dodging bullets even from short distance, and is rather used at fighting armed opponents (All her fellow Dolls including Decapre, Vega, Birdie...), although most of them use short ranged blades. Her experience against projectile users could also help.
This is what I have to say for now, and more might hop into my brain later.
Before casting a vote, I want to wait for replies, possilbly from people who know Deathstroke better than me and could shed some light on what's not properly covered by his file.
