لَعَلَّ اللَّهَ يُحْدِثُ بَعْدَ ذَٰلِكَ أَمْرًا
Perhaps God will bring about a new situation after that. (al-Ṭalāq 65:1)
Here laʿalla expresses hope for a future development. Laʿalla is one of the particles that behave like inna: Allāha is its accusative noun, while the verbal clause beginning with yuhdithu is its predicate.
The verb yuhdithu remains indicative (marfūʿ). The accusative case of the noun governed by laʿalla does not mean that every subsequent verb is subjunctive. This must be distinguished from the construction of an imperfect verb in the answer to a wish.