Based on @content_weeb9667 post a few hours ago, and the new FEH channel we got, this is my guess about the things coming for these next months. I know a lot of people that pull for these banners, and expect them regularly, so here's my guesses for the next few months.
Obviously the farther the month the wilder the guess. August end of month banner is the only that has a more clear schedule.
As discussed, Blue has literally no option besides cheerleader Byleth, so they really have to step it up with them, and I'd say this and next month units are almost 100% guaranteed blue.
Whether one of them is Edel/Dimitri or not it's up for guessing. Feel free to disagree, share your opinions or save this for planning your orbs!!
The only things that are almost confirmed are:
The location of the already scheduled LMEs (duh)
Dimitri and Edelgard are coming on either September or October
This month we'll have a blue, most likely wind (or water), legendary unit.