It's hard to say. Over at Star Wars for example, no in-universe explanations were provided after the ownership change to Disney and 2 Ewok tv movies, 2 animated shows (Droids and Ewoks), and an award winning animated miniseries (2003 Clone Wars) were just declared non-canon without in-universe explanation. Even when Star Wars introduced a literal time travel plotline in the animated show Rebels, at no point was this said or even implied to provide a way for the old continuity to exist alongside the new, in-universe.