Yea Vic's time with the League will probably be kept intact and he still may be some kind of reserve member but I doubt he'll be a consistent part of the main League roster going forward. It's clear DC is taking a more multifaceted approach to diverse representation, with black characters like Mr. Terrific, Black Lightning, and John Stewart getting more focus as of late.
It looks like they especially want to give John Stewart a soft push, most likely because they seem to have plans for the character in other mediums. Whether it's a solo or ensemble (I assume the latter), I think he'll be pushed as DC's "Black Panther" of sorts, with Vic being put back on the Titans.
What that holds for him remains to be seen. DC still hasn't demonstrated they know how to ressurect the Titans IP in the comics. He may just end up being subject to the crappy writing of recent Titans books like all his friends, which isn't that much of a downgrade from how he was already being treated on the League. Williamson seems to be taking on a handful of projects with the team so maybe that leads into a run, which I'm almost certain would include Vic. Partly because he is such a major member of the team but also because DC's emphasis on diversity means they wouldn't want to leave their most prominent black Titan out of a revamp of the franchise.
I suspect a NTT revival post-Future with Vic on the team, though how he'd be used is anyone's guess. Assuming it's Williamson it could mean a more engaging Vic. Williamson's been writing him in the Death Metal tie-ins to JL and he seems to infuse Vic with more lightheartedness and personality than most writers so at least we wouldn't get mopey Vic. In a relaunch he'd probably keep his New God enhancements but as to whether other aspects of the nascent Cyborg mythos get rolled in (Digitalverse, Technosapiens, Grid, etc.) I doubt it.
He pretty much goes back to being the blank slate he always is when in ensembles, so whatever good things come to him are going to involve a writer digging into Vic's lore or building a new one. Whether the next Titans writer chooses to do so is of course dependent on their preferences and how much of a priority DC wants to make him. With a few big non-comic appearances (upcoming SnyderCut, acclaim from Doom Patrol) maybe DC pushes him to the forefront of the Titans line and gift him with new plotlines, Vic-centric rogues, and leadership. Or he gets treated like an afterthought like on the League. Anything could happen but I feel Vic has more room for improvement as a Titan than as a Leaguer, frankly he has nowhere to go but up.