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

In general, the main storyline is being developed for a revival, but it has already been somewhat lost. Specifically for the fourth installment, the storyline is as follows: Lysander decides to find his relatives. To do this, he searches for and finds Sephinor as one of his relatives on his father's side. He learns that he has a brother, Robert, who remained on Enroth. He begins to search for ways to reach Enroth, looking for Sandro, Yog, Solmyr, and Crag Hack. Together, they open a portal to Enroth. And then, things unfold depending on the circumstances. You can create one campaign, or you can break it down into several.