Actually the SACD was born as a retaliatory move from Sony over disc royalty agreements of the DVD and DVD-Audio.
I believe you have it backwards. DSD was created i the mid 1990s to archive recordings and make 'hi rez' new recordings (the first of which appeared in 1997, downconverted to CD). Sony's commercial division got wind of it and decided it would be the successor to CDs..which were being widely copied by then, whereas SACD was designed with very strong copy protection. The first SACD, the consumer media to hold DSD, was released in 1999 as was the first SACD player. The DVD Forum (Toshiba & co) refused to pay patent royalties to Sony/Philips, and thus launched DVD-A in retaliation. The first DVD-A appeared in 2000.