This is possibly the semi-confirmed one that annoys me most from it's sheer stupidity. I'm all for allowing the "Old Guard" to step back into semi-retirement and allow the younger generation(s) their time in the spotlight (I'm a massive fan of Beyond and Generations was one of the best books ever written by John Byrne IMO), but it make absolutely zero sense to age-up Jon to become the new Superman when you've already got at least three more experienced, established characters who would work better at this point instead (Kara Zor-El, Kenan Kong and Conner Kent), whereas at least for Batman the reasons why they aren't going to use the 'more obvious' candidates (Dick, Jason, Tim) have already been played out on other occasions and Damian doesn't work for similar reasons to Jon.