The way Bayern use Dortmund as a "feeder" club but both have been by and large the dominant two in the BL, Bayer (the pharmaceutical owner) would need to have a real bankroll one close season to go for it. Massive gamble though despite Wolfsburg most recently pulling it off (again bankrolled but old head manager had the team playing to a system with two cracking, in form strikers (bit like Leicester last season with all the big guns faltering)). As you said, never say never (Leicester) but I do feel they should strengthen and consolidate as the main challenger before really going for it.