Seems like a trial balloon at making a new newspaper and not an actual decision
I googled this and couldn’t find it on any other site.
Nothing written in Hebrew posted here has anything coming from Rav Chaim Kanievsky. In fact the only indirect reference to him mentions “BAIS H’Rav Kanivsky” which implies that it is his gatekeepers and not him personally looking to make a new paper.
Rav Chaim Kanievsky is certainly NOT known to have such an involvement in politics that he would want to start and be on top of a newspaper. If anything it would be people looking to start a newspaper trying to claim his support