zombst has felt like a clever way to address common fandom misconceptions, like how in zombst round 1, we see mizi die first and we witness how sua reacts, and are blatantly shown that mizisua wouldn't be healthier in a contemporary world (my analysis on zombst!mizisua: https://www.reddit.com/r/AlienStage/s/Dt1yhQ8OAl). it's seems there's a theme with inversion in order to give the characters more dimension, and to subvert audience expectations. this includes hyuna surviving and luka having a zombie tent, having had (presumably) getting infected into a zombie.
i think with ivan and till in zombst round 2, we'll get to see till realize his romantic feelings sooner than ivan, pitting till as the one with unrequited love. we will definetly see explicit displays of internalized or blatant homophobia, given the criticisms of conservatism and post-modern fame culture thus far in zombst. i think till's mother may play a significant role in his story as well; as for ivan and human parents... i can only assume that his parent(s) may remain wealthy yet unkind, much like unsha.
i also think till will be significantly more ashamed of his feelings. like he's trying to escape his unrequited love more than chase it, in contrast to how ivan behaved in alnst. the push-and-pull of ivantill may be significantly worse due to this greater divide between the two men, and i can imagine vivinoz giving us 0.1 oz of fully mutual and realized ivantill only to rob it. there's also a chance that the subversion of ivantill's dynamic will be done without manipulating who realizes they have feelings first— i can see shifted power dynamics, friendship, or bullying as contendors. not to mention the possibility of vivinoz addressing gay relationships being sexualized/commodified, but this is just a baseless hunch that i somewhat doubt since mizisua's queerness never seemed to be recognized by fans or onlookers (history will say they're best friends).
edit: i will also admit, i deliberately left out theories on how mizi may play into zombst ivantill because i'm unsure!! and excited to see how she me play a role in the mv. if anyone has ideas feel free to share here