Lessons of Christ's Return
There are some stories where teaching of the 2nd coming may be included depending on the theological position of your denomination. The teaching of the Apostle's creed would also give an opportunity to focus a lesson on Christ's return.
Since we basically teach by stories there are portions of Scripture that are harder to teach.
We would include the return of Christ in the teaching of :
The Ascension--Christ died; Christ arose; Christ is coming again
The Great Commission--I will be with you until the end of the age
The Lord's Supper--as often as you eat this bread and drink this cup you show forth my death until I come again.
The Lord's Prayer--your kingdom come
Eternal Life--Our scheduled rotation on this is to look a John 14--I go to prepare a place and Revelation 21- no more tears
Parable--Matthew 25 judgement --sheep and goats
Churches that are guided by the church calendar have the opportunity to include the hope for Christ's return in the observance of Advent. I believe,this was the original focus of that season before Christmas and the lectionary texts of that season reflect both on our hope in Christ's return, and the coming judgement.