[quote=@Silmaril]
[@RogerD] Oh, I see. Thanks for clarifying. I might change that part then.
[/quote]

It is more to keep play balance really.
Flash from the comics interacting with a Time Lord wouldn't work too well, nor would a Kryptonian from the comics.
But a Kryptonian from Supergirl (tv series) would make a Dalek a viable threat (wee see here get injured by high-tech weaponry).