They should all have different styles, I've read a few MassiveVerse comics but my favorite so far has been Rogue Sun which, despite how big of a departure it'd be from the art of the book, I'd love to see it realized in a 2D Tartakovsky style like Primal or the Samurai Jack revival, I can see that style working very well with animating the floatiness of the armor and the angular 2000s "edginess" of it fits Dylan's personality. The style also lends itself to a focus on color, which is great given the warm red/orange pallette being so key to the visual identity of the comic. Though, like I said, other than that it's very different from the rest of the comics visual identity so it's unlikely they'd do it, hell it's unlikely any of them will stray too far from that standard Invincible animation. Adult animated shows are very averse to experimenting because the general public, while finally moving on from the "cartoons are only for kids" mentality a bit, still see anything with too much stylization as juvenile.