"the sacrificial worship system will be terminated by the Prince of 9:26"
If you read Dan. Chapter 9 together to keep the context, it becomes very clear in Dan. 9:24-26 that the Prince of 9:26 is the Messiah. He came to terminate the sacrifices and that's what Jesus did. This prophecy has already been fulfilled.
This is the wrong time and place for a dispute over eschatology. The issues are the discovery and typology of the Ark, not whether there remains seven years to the Jewish dispensation.