It wouldn’t be too out of the ordinary for the current PRG formatting to remain in play in the event of gradual relaunch.
In the 90s until early 2000s the formatting stayed very similar, ( 9. Title. ‘G’ ) And the changes were gradual, usually to the change in logo style (static to motion) and a font update.
Which is what is happening with the current Promo and PRG tickers (Flat replacing 3D)
Wonder if Nine have any staff left in presentation or playout from the 2000s, let alone 90s. I know networks still have some technical crew from behind the scenes departments dating back decades, often unheralded crucial players. Seven still have a few in promotions going back to the 90s, explains why their style and v/o have rarely changed the past decade let alone 20 years, given their big success from the mid-2000s onwards.