According to the recent SEC filing you all know, ETH is now a commodity - highlight: according to the SEC
Is there still a chance that some other force (e.g. congress) will overthrow SEC's right to make this decision?
In theory yes they can definitely do something that can overthrow SEC’s decision but the question here is would they? It’s possible but quite unlikely unless they find something they could use to go against the decision. It would be then a long process and it would go through a lot of levels. It wouldn’t be an instantaneous decision so even if they decide that it wasn’t the right decision it would still take a long time to implement it.