When the writer of the book of Hebrews called Jesus (Yeshua‘) the heir of all things, he stated a legal position that has not yet been fully realized. Possession does not depend on the death of someone; the word says nothing about how possession happens. The writer tells us that God appointed Jesus as heir. By right all things are designated for Jesus but they will not become fully His until the end of time. This name of Jesus points to the other end of the span of time from the statement that follows in the same verse, that God made the worlds by Him.
Heir of all things in Greek:
Strong’s Concordance numbers: 2818, 3956
Bible reference: Heb. 1:2
God, who at sundry times and in divers manners spake in time past unto the fathers by the prophets, hath in these last days spoken unto us by his Son, whom he hath appointed heir of all things, by whom also he made the worlds. (Hebrews 1:2 KJV)