All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah and that Muhammad is His slave and Messenger.
There is no harm in delivering the mentioned bayaan before the Friday khutbah for the purpose of preaching to the worshipers and alerting them to some matters of their religion. However, this should not become a habit because it is not part of the Sunnah; neither the Messenger of Allaah nor the Companions or their rightly guided successors were known to do such a thing. Moreover, it should not be done regularly so that people would not get bored of it or get accustomed to it and accordingly it loses its effect on them. Please, refer to fatwa 85175 in this regard.
The rulings of the khutbah do not apply to this bayaan.
Allaah knows best.