Psalm 16, Isaiah 53, and other passages contribute to early Christian scriptural understanding of Messiah's suffering and vindication.
The resurrection vindicates Jesus' identity and claims, while the risen Jesus authoritatively opens the disciples' understanding of Scripture and commissions worldwide witness.
Luke presents Jesus as having been raised rather than explicitly saying here that Jesus raised himself; therefore no 'Raises the Dead' prerogative is assigned.
The disciples move from fear and disbelief toward joy and recognition.