I asked the LEGO company if they'd consider Venom and Carnage for Lego Super Heroes villains.
I got my letter back from the LEGO company. It wasn't really a good 'GREAT IDEA!' message, but they said that "Sounds like your a huge DC and Marvel fan!" and then went on to something like "We're still early in the theme, and were still considering characters".
These aren't exact quotes from the message, because I deleted it, but yeah. Hopefully any LEGO fans and Venom & Carnage fans get their hopes fulfilled. Don't get you hopes up, though. :P