It looks... weird.
It's like they mashed up Halo 3, Halo 4, some Reach (the Warthog is obvious, and that area with the Hornets reminds me of Reach for whatever reason), maybe bits of Halo 5, and maybe even a bit of ODST (with a VISR-type effect and a pistol with a familiar outline).
It definitely has made me curious, I'll give it that. The "put in everything" philosophy made Halo 4 more of a mess and more broken than it could've and should've been, but that doesn't mean a scaled-back version, and one that pulls things in that already appeared in Halo, couldn't work better.