For technologies, I would say add the omnitrix in the future, technically it is not a human technology, but Ben 10,000 learned how to create one and gave it to his son as a gift. About the girls, 4 and 5, I think turning these two into OP characters would be interesting.

It would be interesting if Ren ended up meeting a famous villain OC

O dólar a R$2,00 :')