What comes after Mewtwo on 23rd?

I’m guessing by Monday we will know both the next raid boss and when the CP rebalance will be in full effect. Giratina seems the most likely, and by the all the new moves should be released and I am hoping for a move reshuffle. If not him, the shinys of Groudon or Rayquaza would be the next best guess.

They announced "some spooky happenings going around" and included Giratina after the starters on the last trailer. Starters came, next would be giratina.

There is evidence supporting trash moves on release. Its name is Deoxys. However I still hope they change something last minute...

I was hoping they’d release the shiny for its final week. After Mewtwo’s raid rotation is over they could either jump right into gen 4 with Giratina or release Groudon or Rayquaza with shiny variants and/or special moves for a week. Who knows?

Though shiny Groudon/Rayquaza would be really cool (as others have mentioned), all evidence points to Giratina as our next legendary Mon.

I'm also hanging on to some hope that some moves get shuffled around before more of Gen IV is released. None of the new moves have been assigned to anything yet, so there's still a chance that when those new moves get sorted, other change-ups could happen as well. Giratina could certainly use a better ghost charge move! It's just a hope though. I mean, Deoxys is our EX raid boss and it's moves are garbage.

Probably will be Giratina. Though personally i'd rather they rotate shiny ray/groudon in. Gen 4 has only just started being released, for me i don't feel the itch to catch Gen 4 legendaries quite yet.

It's pretty clear they didn't want you to invest in Giratina and it's coming soon. Give up your naivete and accept the truth.

A new raid boss.... Seriously tho, Giratina has all but been officially announced. It’s been teased by Niantic all across social media, it’s a pretty safe bet... Unfortunately Niantic has learned that the can sell Meta players superior move sets and that the average player couldn’t give a toss about them and will raid anything multiple times for the Dex entry and the chance at higher IVs, so I suspect garbage moves now and it getting its proper moves a few years from now as some sort of “reward”. But who really knows?

"Do you guys think Niantic will give it Shadow ball in the last minute?"

No, not likely. If Niantic wanted to give it Shadow Ball, they would've done so. Why would they set its moves, then suddenly change them right away when it comes out?

It's possible it could get it at some later date, but right now, I highly doubt it.

One little mistake. Giratine does not learn shadow ball in the game. His signature move is shadow force.