Unus the Untouchable vs Super Sabre
Prep-Time won't help either character here. I don't think they've ever been in the Baxter Building, or have heard of the other one. Maybe they could find some newspaper articles on their opponent or something. But at most it would tell Unus that Sabre is a speedster, and tell Sabre that Unus can make something like forcefields.
As I stated in my write up, Sabre has government information as well as whatever he can get from Freedom Force's files. Unus was a member of the Brotherhood, which is fairly high profile. Sabre should be able to get info on Unus and know how his powers have worked in the past.
Sabre can use his speed to attack directly, or create 'sonic booms', or probably just throw things at Unus at superspeed. But Unus can repel any attack with his field. So direct attacks and throwing things won't work. The sonic booms sound like a good tactic, except that Unus can protect himself from the mass of air striking him. And if he can protect himself from the air, he'll block the sound of the attack (sound is just air moving at certain frequencies). So Sabre can't even hurt Unus' ears.
Here's the thing... Unus won't know how Sabre will attack him, so though he may be able to block out things like sound, that severely hinders him as suddenly he's lost a common sense and can't hear what's going on around him. He can do it, but it'll hinder him as well.
This also means that any technology that Sabre finds, and can figure out how to use, won't work on Unus since his forcefield can even protect him from energy blasts. But, Sabre has no such protection from any tech that Unus finds and figures out how to use.
Honestly, I don't think Richards' tech is a factor of this match. Neither character are prone to use it, so I don't think it will be.
The lucky punch always seems to be a valid strategy against speedsters. Especially when they're over confident. All Unus has to do is pretend that Sabre is hurting him through his forcefield. This will provoke Sabre into pressing the advantage and stay in close to throw more punches. When the time is right, Unus stops pretending to be hurt and starts swinging back. With his field protecting his arms, and being a highly skilled fighter/wrestler, a solid punch by Unus will put Sabre down. At least long enough for Unus to finish the job.
A lucky punch could do Unus some good, but remember that Sabre is a highly experienced military combatant trained with the best that WWII had to offer. He's a strategic thinker also. He's not a cocky character and knows what he's doing. A punk from a wrestling ring won't be able to get a hand on the guy. Unus has experience, but nowhere near as much as Sabre does. The idea of Unus playing possom actually isn't half bad, but the thing is, Sabre has great connections and Unus is a fairly known face to things like the government. Sabre would know that his punches wont' work and I doubt he'd even try.
Or Unus can turn Sabre's speed against him. Again, it starts with deceit as Unus fakes being hurt, and allows himself to be pushed back against an outer wall, next to a window. When he gets in position, Unus just turns his field up all the way and when Sabre rushes back in, Unus deflects him right out the window, watching him fall down a couple of dozen stories to the street below.
Again, not a bad idea, but not something Sabre would do. He'd know that Unus is untouchable and has a massively strong forcefield. He isn't stupid enough to just run into a wall, so he won't run into Unus.
Another method is just to let Sabre tire himself out. It really doesn't take much effort for Unus to put up a super strong field (he shrugged off attacks from the X-Men in their first encounter as if they were nothing). He can just let Sabre exhaust himself. And when Sabre is finally tired out, Unus finishes the job.
This could work, I'll grant that one, but he'll have to keep himself conscious as well. You're thinking that Sabre can't do anything, but he's a military man and, as I said, would know Unus and will have 24 hours to think how to get around the force field. The knock out gas, flash grenades, sonic thingies, etc are what he'll come prepared with.
The point is that Sabre can't really do anything to hurt Unus, while, if nothing else, Unus only needs one shot to take Sabre out of the fight.
Unus the Untouchable wins
As stated above, and in my write up, Sabre can bring the fight to Unus and have it effective. He's got more experience, more resources, and an effective power (speed) to pull it all together. Unus is tough, and his forcefield is formitable, but we've seen time and again in the past, there's ways around it, and Sabre will get around it.
Winner - Super Sabre