DB Multiverse
8 Μαρτίου
Rest in peace, Toriyama-sensei
Akira Toriyama passed away. Our work would be nothing without him, and we will continue to try to honor him through our pages. "Writing manga is fun," as you used to say, but today is a sad day. Thank you and rest in peace, Master.This Sunday, DBM's page will be replaced by a tribute.
Some fans speculated that Gero saw Trunks kill Freeza, and seeing that much power, decided to make his cyborgs stronger. It's wrong because Gero didn't know about SSJ when Goku transformed in front of him. So he didn't see the fight against Freeza.
This page gives my personal explanation. In fact, the cyborgs are weaker in the future, because they are 20 years older and are worn-out.
This explanation is DBM canon, but nothing supports it (nor contradict it) in any good DB source.