Your sermon will emphasize the fact that Christ’s return is unknowable and that we must be ready for his return rather than relying on something to make us ready. There is lots of room for application and it will be good if you can also address some of the errors of dispensational (rapture) theology.
36 Pour ce qui est du jour et de l'heure, personne ne le sait, ni les anges des cieux, ni le Fils, mais le Père seul.