The 'Child' is probably going to be the one thing that's going to make any person who is into star wars lore start spinning in their seat. While in legends we've pretty much been introduced to other yoda like beings (Yaddle, Vandarr, Oteg, Minch), this is pretty much the third introduction of the yoda species in canon we've got (I barely care about Yaddle because we're barely introduced to her besides a comic issue) Considering every time we've seen their species its always been involved in the force, so theres a good point this will most likely play a part in the far future in star wars. Hopefully, We'll get some sort of Star Wars Legacy series equivalent with this.
Though I admit, I was kind of disapointed to not see much info related to other mandalorians we know, Like Sabine Wren or at least some sort of hint at Boba Fett. Hopefully we get to see something like the dark saber being used: With John Favreau, AND Dave Filoni at the helm, it's a good chance for it to be shoe horned in, maybe at the end of the season