I like the idea of a man with powers joining the Wonder family, but...
1. Hate the idea of a 'twin.' If we have to continue with the Zeus origin, make him younger half-brother by a human mother - cool powers, but not as powerful as his big sister.
2. I sure as heck don't want a 'Wonder-Man' overshadowing Diana. "I'm faster than you now" literally made me throw the book across the table.
3. I want a well-written guy, not this 'I'm a villain for no good reason and now I want to be a hero because...reasons!' His whole arc is just poorly thought out and badly retro-fitted into the Wonderverse. No one can leave Themyscira and return...but you can correspond with people you've never met on the outside and then abandon your infant son to them?
So I'm a big 'no' on Jason as he exists in the current title, but not against the concept of a Jason-like character.