>>719760413
I expect EVE to be the main playable character in SB2. If there are any other playable characters, I expect them to be playable only for a small segment of the game. I think making multiple playable characters takes too much time and resources compared to just giving EVE an expanded kit with different weapons/skills.
The choice is either to build different playable characters, which are basically different kits, but not be able to use those kits for the entire game, assuming the game remains a single-person action game and doesn't turn into a party-based system like FF7 Remake or Genshin Impact, or expand the kit of a single playable character, adding more options, depth, and variety, which can be used throughout the entire game (although still limited by the progression/unlocking process in the first playthrough). The latter is a more efficient use of resources.
While I get the fun in having multiple playable characters, the effect of separate playable characters (kits) is cosmetic and also tied to a narrative. Instead of just having access to a much bigger kit for the entire game, there'll be times where the story will demand Character A be playable, but not Character B. Then the story will change and Character B will be playable, but not Character A. Basically, you'll be losing the kit of the other playable character often, having a good chunk of the combat options locked away. Additionally, you may also expect that any playable character cannot be killed off, so it takes away some of that narrative tension.
I'm not saying it can't happen, but, at least for me, I'm keeping my expectations for the sequel modest. It's going to be an iterative sequel that takes much of what existed in the first game and builds, expands, and refines it. They're not going to do any thing drastic and they're still a relatively new, inexperienced, and small development team.