1. For Zines, you're going to need something like Hypernotes (think Interactive PDF's) anyway: nostr:naddr1qvzqqqrcvgpzp22rfmsktmgpk2rtan7zwu00zuzax5maq5dnsu5g3xxvqr2u3pd7qy88wumn8ghj7mn0wvhxcmmv9uq3wamnwvaz7tmjv4kxz7fwdehhxarj9e3xzmny9uq3zamnwvaz7tmwdaehgu3wwa5kuef0qyw8wumn8ghj7argv43kjarpv3jkctnwdaehgu339e3k7mf0qqxks7tsv4exumm5v5kku6tszfpwwk
2. Diagrams, Graphs and advanced Tables are a b*tch when it comes to displaying them properly on mobile. Creators already hate it when they don't have the guarantee of proper display on the same platform, just imagine this across XXXX different apps. 
3. If you're going for universality through a common library anyway, you might as well just go for Nostr flavored MarkDown: nostr:naddr1qvzqqqr4gupzp22rfmsktmgpk2rtan7zwu00zuzax5maq5dnsu5g3xxvqr2u3pd7qq9y6ctjddjx7amw9d8qntf0u3
4. I'm making things like app and music album descriptions be wikis behind the hood, so that original publishers are filling in our great encyclopedia as a byproduct 💪 . Asciidoc complicates that. 
5. There are a lot of WIki- and Nostr-specific things to standardize to make them usable, so you'll be flavoring all over AsciiDoc instead. Examples: a "quick facts" section for wikis, Nostr event embeds, zettels, ...