its possible but incredibly unlikely, unless you cant everything that is written on a page as an alternate universe (which theoretically is sorta an alternate plane of thinking and therefore an alternate plane of reality)
Eistien Rosenbridge are theoretically possible, but because of the laws of physics, they are pratically unlikely (immense energies are needed and they create a few paradoxes including a scenario in which they can potentionally destroy the universe, no joke). They also need negative energy (an exotic type of energy which expands space time ), which might be impossible to harness. Ironically the same theory that predicts negative energy also predicts the end of the universe, and wormholes to other universes maybe our only chance for survival.
the weird thing is, dark matter is exactly what could do the trick but as it is invisible it is unharness-able. the even werider thing is as a result of reading oodles of comics over the years ive pretty much developed a decent working knowledge of physics