Metroid: Dreadnought mod for Doom II

I've been taking a bit of a break to absorb all the critique and feedback I've gotten off of servers, streams, videos, chats, and forums, but pre-production for the next stage of development is already well underway and probably will pick up again come the middle of July.
With no real forseeable Metroid entries in the future, what sort of things would you guys want to see in future installments of Dreadnought? There's a whole ton ton ton of things other Metroid fans have been requesting of me, and I'd really like to see what you guys would consider cool.

A few of these have been discussed on other places, but I figure I might as well lay out the options here and now and see what you guys would be interested in.

1: Extra features/maneuvers from other Metroids? (i.e. the sidehop, the Shinespark, bomb combos, etc)
2: Extra items from other Metroids? (i.e., the visor, screw attack, etc)
3: Extra characters in the vein of Metroid Prime: Hunters? (A space pirate, a Federation soldier, etc)
4: More maps, finishing up the DM mappack and/or maybe a few short singleplayer/co-op missions about hunting bounties?
5: Metroid enemies acting as (optional) replacements for the Doom bestiary?
6: iwad dependency removed to play in Heretic, Hexen, Chex Quest, etc?
7: Extra graphical polish? (Cleaning up the skin, tweaking the arm cannon, new sprites for the weapon pickups/bombs/etc)
8: Zero Suit mode? (Fast meleeing with muay thai/krav maga, plasma pistol, sneaking around and taking out enemies covertly)

Lemme know if there's any of these that tickle your fancy, or if there's anything else you'd like.