LogFAQs > #897297599

For Akuma, I'll go with the Street Fighter V version, because you can see a little bit of the opponent being attacked as well as the flashes and the ending pose. As for Sub-Zero, I gotta go with the original incarnation from Mortal Kombat 1, since that fatality is what made Mortal Kombat's name back in the early 90s. The Street Fighter V Shun Goku Satsu is in the second Akuma video I linked, and the Mortal Kombat 1 Spine Rip is the first one in that video.