Eve Online: Odyssey expansion may allow for simultaneous training of alt. characters
Eve Online: Odyssey is the game's 19th expansion, and players have found that you may be able to train alt. accounts on top of your main character for a limited time using the game's PLEX items.
PCGamesN - who definitely know more about the intricacies of Eve Online than I do, trust me - reports that Odyssey will update the PLEX system so that they will allow for training of alt. characters as well as adding playtime to your main pilot.
The site has posted a screen grab at the link above, which shows an 'Activate dual character training' option in the game's labyrinthine menus, which then adds 30 days of dual training time across your main and alt. characters.
CCP Games has yet to confirm the feature's existence, but we should know more ahead of Odyssey's June 4 release.