I am sure that of the 3 competitions they are participating in this season, of course Leverkusen will be successful in one of them because leverkusen is one of the teams that is very consistent with their performances, always winning match. So, in DFP Pokal, Leverkusen will face VFB and if they win the match then they will be at the forefront to win the DFP Pokal trophy. In the European league, Leverkusen is also very strong and they are even among the candidates to win the title this season.
There is no guarantee that Bayer Leverkusen to win one of the competitions. But they surely have a high chance to win the competitions because they can play consistently so far. If they can maintain their good performance until the end of the season, they probably have the chance to win Bundesliga title and Europa League. For DFP Pokal, sometimes this smaller competition gave surprises. It is not easy for a big team to win the competition, small teams can be very difficult to defeat. However, Leverkusen also has the chance to win it as well.
Well, in the Bundesliga I still have doubts about them because Bayern munich don't want to give up the bundesliga trophy this season where Bayern will fight tooth and nail to be able to defend Bundesliga trophy. Xabi alonso certainly wants his team to be able to work hard in every match because Xabi Alonso believes that if this season anything that happens must be focused on properly so that their hopes are not lost in a match they are playing.
I even think Bundesliga title will be easier to win by Leverkusen if they can keep the point gap with Bayern Munich. The stats of Leverkusen looks very good, they never defeated by any team in Bundesliga. Bayern Munich is surely the biggest competitor, but they seem not as stable as Leverkusen to play for Bundesliga matches.