That is a good question Why144000 because they still have not clearly defined it since they made their changes regarding the FDS in 2013.
This was the old teachings regarding the belongings
w 2004 3/1
What are the belongings over which the newly crowned Master appointed his faithful slave? All the spiritual things that belong to Him here on earth. For example, two decades after Christ’s enthronement in 1914, “a great crowd” of “other sheep” was identified. (Revelation 7:9; John 10:16
W 2007 4/1
In addition to providing nourishing spiritual food “at the proper time,” “the faithful steward” would be appointed over the entire body of Christ’s attendants and assigned to manage all of Christ’s interests on earth, “all his belongings.” What would this entail?
8 The slave’s responsibilities include the supervision of the material facilities used by Christ’s followers to carry out their Christian activities, such as the world headquarters and branch offices of Jehovah’s Witnesses, as well as their places of worship—Kingdom Halls and Assembly Halls—throughout the world. More important, the slave also oversees spiritually upbuilding programs of Bible study at weekly meetings and periodic assemblies and conventions. At these gatherings, information on the fulfillment of Bible prophecies is dispensed, and timely direction on how to apply Bible principles in daily life is given.
9 The steward’s responsibilities also include the supervision of the all-important work of preaching “this good news of the kingdom” and making “disciples of people of all the nations.” This involves teaching people to observe all the things that Christ, the Head of the congregation, commands to be done during this time of the end. (Matthew 24:14; 28:19, 20; Revelation 12:17) The preaching and teaching work has produced “a great crowd” of loyal companions of the anointed remnant. These “desirable things of all the nations” are undoubtedly to be counted among the precious “belongings” of Christ administered by the faithful slave.—Revelation 7:9; Haggai 2:7.
In the above article they are basically saying that it includes all the material possessions that they use in the preaching work and also the other sheep, who also belong to them as possessions.
They then stated in 2013 that his belongings now include the Messianic Kingdom
What do “all [Jesus’] belongings” include? Jesus did not qualify the word “all,” as if to limit his belongings to earthly things. In fact, Jesus has vast heavenly authority. “Allauthority has been given me in heaven and on the earth,” he said. (Matt. 28:18; Eph. 1:20-23) His belongings now include the Messianic Kingdom, which has belonged to him since 1914 and which he will share with his anointed followers.—Rev. 11:15.
It no longer includes the other sheep because they are the domestics.
Notice the statement that they have made - 'His belongings now include the Messianic Kingdom. Which raises even more questions.
If his belongings now include the Messianic Kingdom then what else does it include?
What does it mean to own the Messianic Kingdom?
If the FDS can loose out on it's reward of the Messianic Kingdom because they have been found to be a wicked slave and that slave has only existed since 1914, then what of all the other anointed prior to that time, they still get their reward without the requirements of having been appointed and feeding the sheep.