No one's confirming anything. Yes many DMMers are both wishing and speculating on Shiva for water or Osiris for dark but nothing has been confirmed. I'd like to see those two get AW too. But we have nothing as of now. No announcement, no twitter feeds, no stream, no datamine, no leaks, nothing. Not yet.
The only reason why you could even hear DMM players talking about those two at all is because they were already officially confirmed by the developer's nicodouga live stream on March 24th.
And besides:
https://harem-battle.club/kamihime-p...tml#post111498
Blaze already posted the news here before you even started talking about it.