I bet Marvel is scrambling to put together a stinger as good as this fake one was. It's just too good!
Also, I the Black Panther filling in the Spider-Man spot isn't bad. But Black Panther doesn't have the vulnerability that an unmasked Peter Parker would have, and he doesn't have "stakes" in the two sides. All he cares about is Wakanda-- the safety of the world is a side-effect of what he does. Of course, we'll have to see how he's portrayed in the MCU (and I think we're going to get a few minutes of Black Panther in AoU, considering one of his villains is in it), but ultimately it doesn't have as much of an impact.
But that's just my opinion.