Confirmed as of [Editing] this post: Aeon Master (new), "Super Sonic" Progeny, Voidsoul (Writhe's shadowy symbiote thing), Sanction (celestial tribunal)
Speculative:
Galactra - It's a no brainer that we will see Galactra as one of the scions. She references having knowledge that Captain Cosmic and his brother got their powers from Oblivion Shards and seems to weild an almost identical power as them in a different shade of color. Given all three have strong ties to OblivAeon and Galactra calling Cap Cos an "imposter", I'm betting the farm that we will see her in the final battle to come.
Empyreon - As a cosmic powered individual with EON at the end of its name, Empyreon makes a lot of sense as being a scion. What sells me more on this idea however is that Empyreon shows up in Cosmic Concurrence #15. Cosmic Concurrence #1 is all about Omnitron II. Cosmic Concurrence is also the book that gives us the comic Scions Aid. It seems to me that the Cosmic Concurrence book has a ton of OblivAeon related material so his apperance in the book certainly catches my eye. We see OblivAeon's hand on Cap Cos's incap art, so having two minor nemesis targets for Cap be Scions of OblivAeon doesn't seem to far fetched either as they are all pretty closely related.
It's worth mentioning that Greezer is in Cosmic Concurrence for a few issues from #13-18 as well but I am not keen on him being a scion as I am Empyreon. I really feel Greezer is a "B Storyline" in the comic, a side piece of comedy while bigger stuff is going on. Consider that Deadline is also quoted in Cosmic Concurrence #13-18 as well. What do you suppose is the main storyline between those two right? But the Cosmic Concurrence book does bring us some other good guessing material. For instance, we have...
Rahazar - Who is this guy? No idea. But he has two big things going for him to put him in the potential scion catagory. The first is his apperance in Cosmic Concurrence #14. The second one that ties this together is that, somehow for some reason, his nemesis is Parse. Recall that Parse got her powers basically from OblivAeon when it created Omnitron II, and that the same exact thing happened to her a 2nd time to send her into the Fuge State promo territory. Both are direct connections to OblivAeon. Rahazar, given that context, really interests me as a scion.
Ruin - Now that we sorta know a little bit more about The Void, it's importance to the OblivAeon story, and it's connection to Argent Adept, I think a second look needs to be given to Ruin. I don't really have a convincing argument for why Ruin could be a scion other than his possible connection to the Void and Adept though. His quote from V5 Barons deck seems pretty rad though. He could be a being of The Void though which would give him more speculative scion clout then a lot of other guesses.
We don't know what fully happened with Chokepoint and her deck has flavor text from Cosmic Concurrence #19 which appears to be her attack on the Sentinels and Ft Adamant.
I guess when I heard scion initially I was thinking of the scions in progenys deck; a pain and hard to get rid of. Now that we know they're character cards, I figured they were still to the likeness of progenys scions but with hp. But they're actually probably villains on the side of Oblivean? That's neat too. It means various things to look at rather than different colored blobs. And I think it opens the opportunity for the scions to have nemesis symbols since I imagine Oblivean will not.
Yeah, the names of the Scion cards are descriptors of Progeny: it is the Scion of Blight, the Scion of the Storm, et cetera, as one of OblivAeon's scions. So Progeny is back as one such Scion and we're getting nine others.
Voss seems likely, as does the thing on Scion's Aid; whether the two are the same remains to be seen...
If there is a Super Sonic Progeny, could there be other scions that are Progeny clones of other heroes? Like "America's Greatest" Scion or "The Price of Freedom" Scion?
I think Super Sonic Progeny was a play on Sonic the Hedgehog, not Tachyon, lol. After collecting all the chaos emeralds, Sonic becomes all golden and invincible (like Progeny now is!). Hilarious analogy!
Yeah, Voss and Galactra for sure. I really think that the dark passenger that left Visionary (see Unleashed Visionary promo) is another scion, probably he one seens in Scion's Aid.
Another on my list is Kaagra Warfang, she made a deal with some "cosmic entity" and gained the Bloodsworn Colleseum and the ability to move it thru reality.
It is also interesting to note, Wrath of the Cosmos came with Infinitor, Kaagra, Deadline, and Progeny.
Infinitor was directly tied to OblivAeon and was killed saving his brother. Progeny is a Scion for OblivAeon. Deadline is now fighting with the heroes against OblivAeon. Kaagra is not mentioned, and that would make her the only one not connected in some manner
I give Voss a 10% chance to be in OblivAeon. I'm reasonably sure that Voss isn't slated to be seen again until Tactics IIRC. I know folks have been itching for Voss, but I think that payoff is a ways away.
Just so I fully understand scion is synonymous with minion? It would be cool if some of the mini nemeses return as scions as is being suggested here. It'll cool to hear the ties between the scions and the new heroes, because I'm sure those are where the nemesis match ups happen.
I can't be certain, but didn't we get some sort of confirmation that the art on O-X's Reset is from around the time of OblivAeon? I've never had much doubt that the shadowy figure getting punched in Reset is Voss, and if that art is from a time when the Scion's were active I'd say the percentages rise sharply.