Well Acclaim published comics about Turok and Shadowman for a bit which led to the Iguana/Acclaim games on N64. A quick google says that Shadowman's comic is currently on hiatus but the rights are held by Valiant (they also had Turok 2 decades back). Turok's comic is now over at Dynamite.
Acclaim went bankrupt and its assets got bought by a company called Acclaim Games (no relation), Throwback Entertainment (looks like a sticker company) aaaand WeGo from South Korea now hold the rights to Re-Volt and those kind of N64 titles.
There was a Turok game in 2008 for X360 it looks like, but that was distributed by Touchstone Games (and Touchstone is a brand Disney uses to release 'mature' content or bad films they don't want souring their brand).
SO long story short: Turok is probably under Disney unless the license has lapsed by now, Shadowman is under Valiant (they also released the PS2 sequel together with Acclaim). Seems highly unlikely that they'll make it to virtual console, certainly not by Acclaim. Sequels/new games seem more likely, though Shadowman... I mean if they're not even publishing the comic anymore, sounds like a dormant IP at best.