I think the likelihood of a Gadget coming to fruition for any of these will probably be a combination engineering ease and actual popularity of the model pistol.
The way I see it, and LTT may be well positioned to do it, a lot of evangelizing will be required to just get Glock owners to adopt the existing Gadget--and Glocks are ubiquitous.
With the above thoughts in mind, I'd guess it'd be a long while before Gadgets come to fruition for any other pistol. If CZ P10 sales/adoption is really high, it might be the best potential next bet.
What would do real wonders for popular adoption of this sort of mechanism is for a decent-sized LE agency to allow it on their Glocks. Probably a long shot.