The bad news is that despite what was reported, unfortunately, the name "Serena" was not used for Sailor Moon Crystal in Mexico as previously reported. Instead, The Other Name was used.
The good news, though, is that there is an active petition to get the old dub back. As mentioned, this site represents all who want Serena, and that fans independently want Serena means that even though this site is inactive, the spirit in favor of "Serena" is not dead.
We. Want. Serena.