Obito will be in some new collection, that prolly will be added in future. That's my guess.

Kakashi [shonen] was already few times available as drop in Great Plates event for example- so I would bet that he might show up in some events again.

Keep on suggesting to add him using for example the survey for events like this one https://forum-narutoen.oasgames.com/page/show-post-38547-1.html to share your needs- or via local GL if you have one and know who is it. There's always a chance that they will listen, I think~~