Wow, this is a big subject - space doesn't permit a complete analysis but the night visions of Zech. assures God will continue His covenant with Israel. Messianic hope is rekindled by the ordination of Joshua as priest and Zerubbabel as govenor. Though these are historical events - Joshua is a "type of Christ" and and the imagry of the vision points to Christs' crown rights as God's covenant keeper - His Kingly-Priestly office and the ultimate establishment of the true Kingdom of God (Zech. 14; Ez. 40-47.)
This read of apocalyptic literature is called Biblical Historical - based upon Paul's "two-age" model of eschatology.
Apocalyptic literature is highly symbolic and uses a "both, and" approach to prophecy - not an "either, or." Meaning the OT visions had two-fold fulfillments. While Joshua is ordained, future fulfillment of Christ's Kingly/Priestly office and final Return is foretold. BTW, Revelation is a recap of the OT/NT and emphasizes the reality of Christ establishing His Kingdom.
See the link to Meredith Kline's essay:
http://www.kerux.com/documents/keruxv12n3a1.asp
Some good sources on this very lengthy subject include: Geerdos Vos "Paul's Eschatology"; Meredith Kline "Glory in our Midst" "Kingdom Prologue"; related authors Edmond Clowney; Herman Ridderbos; Kim Riddlebarger: GK Beale.
Bottom line, as with all Scripture, read through the
entire book of Zechariah without stopping to get a clearer picture - same with Ezekiel.
The theme of the entire Bible is God's Kingdom and how He redeems His people.
If you're new to "Redemptive Historical" eschatology - I'd be happy to direct you to more leads about it. Meredith Kline and Vos are seriously difficult reads - though satisfying once the concepts are understood. There are easier - beginning studies to refer to if you want to. Jesus and Paul for example. Begin by noticing their language each time they explain the "Kingdom" or refer to "this present evil age" "the age to come." This is the best place to start, I think.
I'm currently studying this stuff - and am pretty dense remembering everything. It helps me remember to re-explain things though. (Bear with me...)