I don't think so. His entire story arc was the antithesis to what Wankanda believed in. To have him return to fill in that role would have undermined everything he believed in and what Wakanda values in its leaders. I loved Killmonger but for me this would be romanticism.
Not only is this bigoted but its also going to be next to impossible to monitor this. Something like social media that simply has gay people on it would be ID required. They didnt think this one through.