When I think of Thanos I think of all the pseudo philosophical musings he would have with who ever he was facing in a given story, especially the ones written by Starlin. So I am biased in wanting a voice that might me a little more mellow yet strong. Andre was great on the old HOMICIDE:LIFE ON THE STREET. Pebelton was always waxing philosophic on that show. If it is BDT I am sure they have their reasons, but I would need to see some BTS footage or a make up test or see some preview stuff before I would be on board without qualms.