I saw this thread-title and was briefly excited because I had the following beliefs about what was going on:
1) There exists a superhero comic wherein the title character’s secret identity is not known to the fandom,
2) There exists within a recent issue of the comic sufficient evidence that the secret identity is real human person Tilda Swinton to prompt a thread about it,
3) Dr. Strange sounds to me like “guy who has a handlebar moustache and a cape” and thus there could theoretically be a comic with at least one scene in which Tilda Swinton hurriedly puts on her false moustache and cape before going into battle.