Yup. I'm not sure why people buy into this when it flies in the face of all the evidence.
WB has made it clear to the TV show creators/producers that Batman, Superman, and Wonder Woman are off limits on TV for the time being. Granted, we've seen Bruce Wayne as a kid in Gotham (but we won't see Batman until the finale, likely, something I'm sure WB would be ok with), and his name mentioned in Flash in one of those future newspapers Wells/Thawne reads (if I recall correctly). But it's unlikely we'll see any mention or appearance of Batman, Superman, Wonder Woman, etc on any of the Arrow/Flash universe shows (the producers have repeatedly said they're off limits and not allowed to use those characters per mandate by WB).
Same applies to other DC shows like Constantine (presuming it comes back), and even Supergirl (while it's said a Superman stand in will be used, it seems little more than a cameo and a non speaking role, a figure seen from afar). So cameo mentions/appearances seem to be allowed in certain cases, but likely no speaking roles or in-costume close ups of a hired actor in the role, etc.
