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Ulvaeus told Denmark's Ekstra Bladet tabloid this week that "it takes an extremely long time" to make the video with the avatars of the group members, adding "it has been delayed for too long."
The band earlier said Ulvaeus, Benny Andersson, Anni-Frid Lyngstad and Agnetha Faltskog reunited to plan a virtual tour featuring digital avatars, and that one of the two new songs is entitled "I Still Have Faith in You."
ABBA shot to fame by winning the 1974 Eurovision Song Contest with "Waterloo," and had big hits in the 1970s including "Dancing Queen" before splitting up in 1982.