So based on the current release schedule, there's no estimation for Leo's route yet or am I misunderstanding?
No, there is no estimation for Leopold's route yet. After Guillaume's route is completed, I am going to allow the Kickstarter backers to vote on which route I work on next, so I won't know until the vote is held. Leopold is very popular though, so I would be surprised if he was not chosen, if not next, then at least soon.
Thank you for your interest
Just to let you know, (and I will be making an 'official' post regarding this once the results are in at the end of the the month), but votes have been opened for backers on the next route, and Leo is currently in the lead by a comfortable margin.
There is still time for things to change but, by the look of things at the moment, Leopold will be the next route worked on after Guillaume's is finished. ^_^