Ok, i am looking at the list and going to predict the EN banners:
Izuna is probably next , and together with a perm ( 2 weeks)
Arisu with a perm ( 2 weeks)
Twins with a perm ( 2 weeks)
Cherino ( 2 weeks)
Yuzu ( 2 weeks)
Azusa ( 2 weeks)
Koharu ( 2 weeks)
Summer (double banner) ( 2 weeks) ( now this one is weird, it might not happen at this time, it might happen later, or it might also follow JP schedule)
Summer 2 ( again) ( 2 weeks)
Shiroko Riding ( 2 weeks)
Namely for the ""core"" units, we have 4.1 weeks to twins + how ever many days this current banner has
another 10.1 weeks to azusa
12.1 weeks to koharu
and 14.1 weeks to summer hell
Now all of this might go to shit when they decide to possibly introduce in-season units like christmas and new years early lmao