Next season will not be easy for Leverkusen if they don't give Xabi the new players he wants, we know they will be competing in the Champions League next season and there will be many teams they will meet with fanatical squads, in this case I hope Leverkusen management spends money to convince several players to strengthen Leverkusen next season.
Of course, with their success this season we cannot be sure what next season will be like, of course the Bundesliga clubs will also strengthen their sectors so they can compete with Leverkusen and other teams, next season will of course be different from this season.
I'm not a seer but I can presume next season to be very competitive in all the top and major leagues in Europe. Bundesliga will not be left behind to witness this competition because Bayern Munich will definitely come back stronger with the aim of reclaiming their championship next season. Bayern Munich new couch will also try to impress the management with his work next season in order to build trust and confidence between the management and himself. Leverkusen should not be distract from the media hype, they should maintain their performance as if they are struggling to come out from relegation zone.
I believe that if their management is ready to spend money on transfer market, majority of players will be interested to join them because they have earn themselves the recognition on the media with their incredible unbeaten record. Players now especially the upcoming younger ones are interested in a team like that where they can be talked about in order to be famous and boost their career to higher level.