I'd personally vote no. If they're done with Cavill and the original DCEU version, they need to start over again, not go back to another dead incarnation and try to revive it, regardless how loose the connection may be. I just don't think its a good idea from a marketing point of view. "Remember that version of Superman everyone hated before the version Snyder made you hate? We're gonna go back there". It may not be totally fair but at the same time that would be the general impression that isn't that wrong. I'm glad Routh got another shot under what looks to be better circumstances, but I see it more as a nice bookend. Not the start of anything.