Second that.
"SPARTAAAAN PUUUNCHHH!" doesn't seem to fit.
The other animation companies already have experience with something similar to the Halo Legends concept, like Animatrix and Batman: Gotham Knight.
No worries there.
But Toei? I'm worried.
To be fair, though, Toei's section of the story is ostensibly an affectionate satire of the franchise.
Granted,
this information is off the Halo Wikia, but the citations are there if you need to confirm them:
Bones -
Prototype: A marine has been sent to a distant planet to destroy a prototype powered armor, but when he arrives he finds the planet is still inhabited by humans who are under siege by the Covenant. The suit is their only hope for survival. So he disobeys orders and keeps that suit, at least temporarily, to help the civilians.
Casio Entertainment -
The Package: A CGI-film taking place during a SPARTAN-II raid on a Covenant CCS-class Battlecruiser using the Booster Frames.
Production I.G. -
Duel: Taking place during the time of the Sangheili-San 'Shyuum alliance, forming the Covenant Empire.
Production I.G. -
Homecoming: Focused on the tragedies involving the SPARTAN-II recruitment in 2517, and the Spartans coming to terms with their origins.
STUDIO4˚C -
Origins: An expansive history of the 100,000 year long
Halo universe. It's comprised of two parts.
STUDIO4˚C -
Babysitter: A story about the rivalry between the SPARTAN-II Commandos and the Orbital Drop Shock Troopers.
Toei Animation -
Odd One Out: A non-canon and satirical interpretation of the
Halo universe featuring SPARTAN-1337.