How can we connect the fifth installment with the previous games in the series?

By the way, in one of the missions of Isabel's campaign, she mentions Crag Hack in a cutscene. Does that mean nothing?! :)

Maybe it's just a random mistake. And Sandro from parts 3 and 5 are just namesakes (people with the same names).
But in general, I like the idea that the mages of Axel discovered a mysterious portal that led to Ashan.
In my opinion, it's normal and the idea remains that these are different worlds.