Tasmanian tigers?

I'd love to seem them come back as well, but keep in mind that it's much harder with an extinct species. I'm not sure which animal we could use as a host womb. Also, I suspect the tiger went extinct long enough ago that no live tissue samples exist - which makes it much harder to come up with a viable cell. (I think the current idea is to find the closet living relative genetically, and use CRISPR or something similar to rewrite the the bits that are different, and repeat until you have a living cell with identical DNA to the source).

I'm optimistic that these problems will eventually be solved, but there's still a ways to go here.