Well, SM/DP is ending soon so that'll leave just ASM and FNSM.
I wonder if Spider-Gwen is indication of how Spiderverse characters not named Spider-Man will sell.
I'm curious how Black Cat's upcoming ongoing will do. I'm cautiously optimistic, but I don't think the writer and Travel Foreman are the types to set the sales world on fire.
It definitely doesn't have the prestiege the Spectacular name does, but I think Spec also benefitted from being the first solo Spidey satellite in a long while (even if it initially wasn't much of a solo book).