I think turning Tim Drake into somebody with Mexican ancestry actually wouldn’t change his appearance much. Most Mexicans tend to have dark hair anyways and some Mexicans are this pale, which makes this not that big of a change either. Let’s not forget that there are Mexican Americans with Anglicised names like Rachel McLish and/or people with Mexican ancestry but don’t have Hispanic names (Louis CK to my knowledge). There are also naturally blond Latinx even like Cameron Diaz and Sofia Vergara.
It proves you that this can go either way with Tim Drake. It wouldn’t change his appearance much as there are white-passing Mexicans out there. In the same manner making Barry Allen Irish-American wouldn’t change much either (naturally blond Irish people exist if Mairead Ni Mhaonaigh and Ronan Keatning are any indication). The biggest changes however might come from making them less of fan surrogates.
Being a fan surrogate might explain why they don’t seem to have personalities because if they did develop personalities outside of this, fans would find them unrecognisable. Heck this even exists without having to grandfather a certain ethnicity onto them though making Barry Allen into Dante Alighieri would be just the same too (but that’s also proving my point that if/when naturally blond Italians do exist, that still wouldn’t change Barry much either*).
*Barry Allen does exhibit some stereotypically Italian traits like tardiness and Catholic guilt over not saving his parent in time (though it seems to be more of an Irish Catholic thing). It’s been assumed that Dante himself had blond hair, is often depicted wearing red and is a Virgil fanboy. That and obsessing over otherwise shrewish women (Iris West and Beatrice as portrayed in the Divine Comedy).
fynm 