Tracy Tormé is currently very sick. He also doesn't have the power to make a SLIDERS reboot happen; a studio and network have to want to see it happen. It's also unlikely that NBCUniversal would sell the rights as just owning them makes them worth more as a conglomerate that owns an extensive library of intellectual property.
I think Slider_Quinn21's next generation idea is too convoluted. And we shouldn't be telling the SLIDERS fanbase (such as it is) that Quinn, Wade, Rembrandt and Arturo were shot and blown up and got their brains sucked out and put in a joke box and merged and lost and probably died -- but somehow survived all that only to be incarcerated and tortured.
The next gen route is fine, but I'd just have three new characters discover sliding (with some leftover Quinn tech in his basement being a leap forward) only for them to get lost and be rescued by Dr. Mallory who serves as their mentor. Keep it simple. I think it'd be fine if Dr. Mallory was tortured and escaped, but I'd advise saying that Wade, Rembrandt and Arturo are free and clear and fine.
But even then, I don't think it makes sense to attempt a second generation. STAR TREK: THE NEXT GENERATION was drawing upon a lengthy and revered legacy and legions of fans. As far as the audience is concerned, any new SLIDERS whether sequel or reboot *is* the first generation.
Temporal Flux's brilliant approach is less a reboot, more a gentle segueway. It serves both us and the general audience. Who would Quinn, Wade, Rembrandt and Arturo be if sliding had never affected their lives? TF's genius takes us there.
And Transmodiar cleverly proposed: what if these aren't alternate versions but the originals living their lives after the reality-warping Kromagg-human war erased sliding from existence, its discovery delayed by several decades?
This is generally where Slider_Quinn21 points out that John Rhys-Davies has no business bungee jumping and fleeing the police at his age and that Sabrina Lloyd can hardly play the youthful adventurer today. But that would only make the show better; they're not suited to sliding, they're out of place, in the wrong world, far from home.
For people like Slider_Quinn21 who don't like reboots, this REDUX is not a reboot. It's the aftermath the Season 4 Kromagg war. For the general audience, it's a new beginning.
Or you could recast. I'd like Lucas Till to play Quinn, Elle Fanning to play Wade, Colin Salmon to play Rembrandt and Victor Garber to play Arturo. And I'd like Jerry and Sabrina to play Quinn's mother and father, Cleavant to play Rembrandt's brother and John to play Arturo's mentor.