While Villains have been on the posters before, they repeatedly called this artwork the SCIONS, if they had just called it an art piece or not said anything about it other than who drew it, but they kept saying this was the Scions, which other than mystery woman at the top and Zenos, it is. That's why I think there might be something to this, with them saying this is an art work of the Scions, and if the woman at the top is Venat, it makes sense she'd be helping, temparray or if she sticks around so counting her as an ally makes sense. So that literally only leaves Zenos, in an artwork of the Scions.

Who knows what they'll do with him, but even if he dose join us, doesn't mean he's instantly a good guy, unless they go with a "he wasn't fully in control of/himself all this time." if they did take the Vegeta route, it took Vegeta real life decades to actually redeem himself, so I don't expect Zenos to just join, everyone be cool with him and he be a nice guy.
I actually like Zenos, so I'd like for him to stick around and to see what they could do with him if he got some focused development rather than being stuck in the "meanwhile..." sections.