Probably. I kind of had a moment the other day when a lot of stuff clicked for me regarding Chief (and Crash to a smaller degree).
-Bingeing Simpsons: Tree House of Horror episodes, I realized that Halo and Crash Bandicoot are referenced several times in the series. May not seem like much but it made me realize that Halo and Crash are some of the few non -Nintendo franchises that have mainstream media presence.
-Was at Spirit Halloween in my town and in the video game section. The franchises represented by costumes? Mario, Zelda, Pokemon, Sonic, Pac-Man, Fortnite, Minecraft, Kingdom Hearts, and Halo and these were costumes for both kids and adults.
-Like I said back in July, the rumor is that Master Chief's trailer is supposed to be a capstone of sorts and highlight multiple big announcements. At first, I thought Chief was going to only be tied to one first party announcement but now I'm realizing it's probably two, with one of them always being planned as 2021 at the earliest. To support this, Chief was supposedly signed off to only be allowed to be depicted with certain characters and it's a very small list. With how Steve turned out, these weirdly specific rumors got a ton of backing. I don't know how the hell people got access to this kind of stuff but, then again, Microsoft kind of is terrible at keeping secrets too so...
-They say hindsight is 20/20 but Smash has basically been trying to outdue itself each year at E3 since 2013. The last Smash Ultimate E3 for God knows how long ending with Crash or Chief honestly makes sense. E3 is the Kingmaker. It's given us Bowser, Peach, Wario, Snake, Megaman, Pacman, Ryu, Ridley, Hero, Banjo, and now Steve so I honestly jumped the gun thinking Crash or Chief would be this year. Crash was literally Sony's mascot for three years and Chief is the face of Microsoft. Waiting until E3 2021 (the last E3 before Season 2 officially ends) to unveil them honestly makes sense.
It's just tiring because trying to figure out the timing for stuff is extremely difficult because you don't know how early information is. On the upside, a ton of 2018 stuff is coming to fruition in droves so by all logic Geno, Waluigi, Ryu, and Lloyd should all be approaching their respective moments of truth within 3-4 months. I say this because most of the stuff that has come true like Mario 3D World Deluxe, Pikmin 3 Deluxe, Skyward Sword HD, etc were all like November/December 2018 rumors while Minecraft in Smash was summer 2018 so we're honestly reaching a critical point for most of these evergreen Smash rumors.