https://wccftech.com/xbox-series-x-s-backward-compatibility-start-offering-disappointing/

An Xbox Series X and Serie S backward compatibility announcement is rumored to be coming very soon, but it seems like it will only mark the start of something, according to a reliable source.

Speaking on the XboxEra forums, Klobrille, who was among those who talked about the announcement supposedly coming tomorrow, suggested expectations be kept in check, as this announcement is only going to be the start of something, and the initial offering may be disappointing. This probably means that only a few backward compatible games will see their frame rate doubled in the immediate future, and support for other titles will be added down the line.