Bayer Leverkusen going for another unbeatable season record isn't going to be an easy one but their chances of lifting the trophy back to back is still on the high side with Xabi Alonso still as their manager. Especially now that Bayern Munich who the very team have a tight competition with them has a new manager in place which I don't see the possibility of Bayer Munich up this season.
I doubt if they are going to make another unbeatable season record, even if eventually they succeed at it in the bundesliga, I doubt if they will succeed at it in the champion's league this season, it's been very rare on the record any team who has scaled through the champions league unbeaten, and Leverkusen who is a first timer cannot at this point be able to be able to pull up such, not when the likes of Madrid are there and Manchester city who is also aiming at the trophy too. Xabi is putting all efforts to getting prepared for the new season a d so far his potential to winning the bundesliga is very high and most likely will help him.