@revolver275 Technically, Marvel and DC both have had a lot of stuff happen in them that you could arguably call isekai. Including an entire thing where Deadpool fights oodles of himself from alternate universes. One could further argue that anything to do with him or any of those myriad universes inherently comes with some vague isekai-ish connections. Having said that, I haven't even opened page one of this yet so I don't know if this should or shouldn't have the tag for more conventional reasoning. What I'm saying is just food for thought.
Okay there we go, I took a look at it and this probably shouldn't really have the isekai tag and all. Time travel yes, other world or dimension or anything, not so much in this (minus the tenuous connections I already mentioned that really don't even count).