Hey, it's good to see all the development work being done!
One great thing is Wallace is very recognisable in all your images. You're certainly not suffering from redrawing your character identifiably, which is super important!
He has a kinda perma-smirk going on here. I think that's what Dino is referring to (smirking dudes come off as dicks and make us wanna punch 'em). Now that's not something we often see in real life, though there are exceptions.
And it's good to see that it's mixed up a bit in your test pages here, but just bear in mind "If a guy becomes a douche and nobody's around to see it, does it make a smirk?"
Another thing that has jumped out is his most common pose. On your new design sheet, and a few other images here, he has two bent legs. One forward facing, the other in profile. I'm noticing two potential issues. The first is that his shins are too long compared to his thighs. It's certainly very easy to draw knees too high, and I would just urge you to check that. Knees should just be half way down It also seems as if his heels are together, so rather than appearing in the 'relaxed' pose that I think you were going for, it seems closer to a weird squat. The biggest tip I would give is thinking about why you would bend your legs. It's a case of balance mostly. A character with a straight back is gonna need straight legs to keep him upright. If his legs are bent however, he's gonna need to lean/hunch in order to balance that out. So Wallace would look a lot more natural with either straight legs, or throw a little bend in that back, have him lean forward slightly because as he stands now, he's on the brink of toppling backwards.
I mean, really, the simplest thing to do is either physically, or mentally draw a line from between the centre of the characters feet directly upwards. Equal amounts of 'weight' should fall on each side to pull off a balanced look. This obviously doesn't apply to action shots blah blah.
The image of Wallace leaning on the wall is great though. Your legs are proportioned really well and his weight is well distributed.
Regarding your intro story, think about what you want to tell us. What is gonna add flavour to Wallace, and any cool tidbits for potential opponents?
At the moment we find out he's in Void (kind of a given).
And after starting his vlog he openly admits to having nothing to vlog about. I know it's simply an intro comic, but if he's gonna vlog I think it would be more engaging for the viewers to see him enthusiastic about it. If we see your character being apathetic we're less likely to engage. Maybe seeing him casually using the water powers to move his camera or arrange shots would be a more natural and interesting way of revealing that information to us. Either way, I think having him film himself is a creative way to do it.
Aside from that, don't be afraid of planning out pages small, and in a way that reflects the final dimensions of your comic page. Take it from me, it's gonna save a lot of annoying resizing and redrawing down the line if you're trying to cram shots in.
Keep at it, and looking forward to colour!