@twinklecake Madoka was more our time with magic elements/fantasy and a tiny bit science fiction, on a level that was subtil at most. Avatar was his own universe in all that combined fantasy and all rather early/simple terms, which did fit the world, but Korra and all was (from my perspective and many people I know) slightly above average at the very best, if we ignore convenient plotholes.
And regarding other stories and isekai ... I did read 5-6 of them and not even one could be counted as good. On the contrary, they were really strong and the sudden Science fiction parts were the points where it did go downhill. The same is with most stories that involve time-traveling and everything.
If I line up stories where this points were good or bad, the bad side would outnumber the good ones on such a scale .... good luck finding the good ones. Thats why I am reserved about this story.