Now since Aqua has either been corrupted by darkness or been Norted (since this is a debate), there could be a race to find and save Ven before Aquanort gets to him. Could Sora find out where Ven is another way? Should Ventus get norted too? i really hope not.

Depends on if Riku and Mickey save Aqua in time. If they don't and Xehanort and the Seekers get to her first, then they will probably find Ven first. However, they could pull off some type of "heart connection" like they did with Aqua and Terra in 0.2 where Aqua was able to talk to Terra. Maybe Sora or someone will be able to do that as well ? Maybe they could get Ven's location in time before the Xehanort side of Aqua reveals where Ven is.

In time Sora will save him, but he will need Aqua by his side to help find him. Only she knows how to get to the bottom floor of Castle Oblivion.

It depends on Aqua’s fate. Only she knows where Ventus is and how to access the Secret Chamber, without her, it would be impossible.

Ventus Situation right now has to me a big secret boss sign over its head. Big empty room left alone all defenseless