The two new cards look more like a evolution of the current meta then a total power creep. Looks like they will be around the same or just slightly more powerful than the current mono gods.
This is a much better meta shift than gogeta to SV where the Mono Gods invalidated Gogeta. It looks like the Mono Gods and the two new leaders will be valid in this meta.
I wouldn't save your stones for these two simply because the ideal teams for them will probably use the mono gods anyway.
I like how they are basically a good guy team and a bad guy team. I will disagree about being slightly more powerful, as they seem quite a bit more powerful. Those passives are insane. Right now, SV is awesome because of his block then counter attack. Imagine countering up to 3 times, with 2 of those being supers. That's batshit crazy.