Did they mention any new Nikke for June and when's the summer update usually?

I skip all non-limited/wishlistable Nikkes. I'm trying to decide if I have time to rebuild currency if I want to get the wallpapers for Eve/Raven (no purpose other than liking Stellar Blade and the characters). Currently have 195 rainbow / 393k gems / 2370 gold.

I don't own any summer units, so part of me is thinking since SU owns Stellar Blade IP, they have more of a chance to come back? and I should wait for the new "long awaited" Nikke / Summer units?

Or they won't come back till Stellar Blade 2 or something which would be many many years....

Thoughts?