you're expecting them to start setting up another crossover next year even though the last one had a 2 year break, World's Unite was seemingly largely critically panned, and there arent currently any other Archie Action books to crossover with?
The Crossover doesn't need to be next year to have a story tied to it.
Worlds Unite was panned
here but did succeed in boosting sales. It was the bestselling arch since the first post-reboot arch by a large margin.
The other Worlds still exist even if there isn't an ongoing book for them. They could also take it in another direction and do something like the current SU Arch or the last Sonic milestone and acknowledge that the New Multiverse exists but not show any characters in detail.
They could also just Crossover with Boom! That'd count.