2 weeks ago on the Ed Lover Show, I think it was Sleepy Brown who said the first time he ever met Outkast, they were rhyming and doing a routine over The Scenario remix, and how they always respected Tribe and were hip-hop historians.
I def think they discussed an album collabo, but there wouldn't have been a chance in hell the sh*t would have ever been recorded. There are probably more theoretical unrecorded supergroup albums than actual recorded albums by now.