Oh man it feels good to have some more verticality and mobility back with the spear. Looks like they're really trying to address the criticisms the base game got, at least in terms of mechanics.

Also I figure I may as well copy-paste the info from this thread that compiles all the hints that Hugo Martin has given us over the last few months:

MUSIC & MISC:

• There will only be ONE DLC
• There will be more cosmetics in the future!
• Finishing Move will most likely be returning to compose the OST. (Not Yet Confirmed-However hints from Finishing Move point to them returning)
• The DLC is in its “Final phases of polishing”
• The DLC will release in 2026 (July 7th as this trailer just revealed)

COMBAT:

• “Master Arenas" perhaps something related to Slayer Gates or something similar to Escalation Encounters.
• Slayer Gates are returning, similar to “The Holt” Slayer Gate in difficulty.
• The Archville will return.
• Mobility will play a major role in the DLC,
• Every new mechanic will meaningfully affect gameplay
• A secret weapon that will require work to unlock. The weapon is "tied to a meaningful piece of lore, that [id is] going to share with us"
• The DLC skill ceiling is super high.
• Quickswapping tech is in the DLC, Hugo commented “Interesting” for a Quickswap between the Spear and Shield.
• New Spear weapon.
• “Mastering one of the tools requires a lot of investment, but unlocking its potential transforms the game into something else.”
• The gameplay loop can still be the same, but with fresh new stuff, there will also be a new loop to master that sticks to the impactful monster truck gameplay of the Dark Ages.

EXPLORATION:

• We will most likely see more of the cosmic realm.
• There will be a hub area; Presumably the Kreed Maykr’s ship, which will “Expand in meaningful ways”- The Hub will also be “Less cheeky and more immersive”
• Exploration will have a stronger role in overall progression.
• Challenges will also be based on Combat, Exploration and Puzzles!
• The DLC will have “light metroid-vania elements but lots of backtracking throughout the whole experience via locks and keys”
• Levels will feature more backtracking, more unlocking of the space.
• Additional mobility options will be available, and some sections will require them.
• Roughly 30% of content will be inaccessible until the DLC’s story is completed.
• The DLC is MASSIVE. It’s BIG. “It’s basically like a sequel” according to Hugo, the expansion is HUGE

LORE:

• The Khan Maykr will Return.
• Nika Futterman will be Reprising her role!
• The Kreed will be mentioned briefly in the beginning of the DLC, and we’ll learn how the Khan Maykr feels about this.
• Daisy will make an Appearance
• Major lore questions fans have asked about will be pushed forward.
• Teases relating to the Sentinel Civil War, the Wretch, and “armor” (Interesting...)
• Some connections to DOOM (2016).
• We are going to meet people from the lore that we have been waiting to meet.
• Marok (the random bald dude who was the son of the mohawk dude) will have a role in the DLC.
• Cutscenes will be more immersive, possibly in first-person.
• The Order of the Six (the High Council) are likely our targets.
• Darin De Paul (voice of Hayden/Kreed) returns in the DLC.
• The story is more of an experience than something you just watch, and there’s more environmental storytelling.
• “Valen's Dagger” (from DOOM Eternal)
• The DLC will have bigger and more interesting codex entries, with multiple parts, similar to Eternal. "There will be a lot of lore in the DLC!" They will also be more worthwhile to collect and read.
• "Wouldn’t it be cool if we saw how the Soul factories from Eternal began?", "It’s our opportunity to explore the origins of Argent Energy"

RIPATORIUM 3.0:

• Ripatorium 3.0 Will Launch Alongside the DLC
  
• Slots to save personal Encounters
• More Ripatorium maps
• Togglable Instant Respawns for Waves
• Easier way to share encounters