Blade is a Marvel character. In Deadpool, at one point the bartender guy shouts at Francis & Thick Woman "have fun at the midnight screening of Blade II"
So what the fuck does that mean? Is Blade the character popular enough in-universe that they made a movie about him? Does it mean that Wesley Snipes exists? Do the plot elements of the Blade movies come from interviews or something, because god knows they can't be adapted from the comics because Blade actually exists in that universe?
And it's not like the bartender has the 4th wall breaking powers of Deadpool, so what the fuck?