The only way for anyone else to ever have a chance, would be getting a rich owner who can spend as much as Bayern, but not that many people could spend 300+ million a year on a team, so I am pretty sure that Bayern is comfortable at the moment and won't face that much difficulty from any other team. It does make the league a bit boring, but it is the reality we have to learn to accept.
Bayern Munich's owner is rich. More importantly, the Munich management is interested in spending enough money. We see many clubs that are very conscious about spending money despite having very rich owners. But Bayern Munich does not skimp on spending money to make their squad strong.
No club in the Bundesliga is as rich as Bayern Munich. That is why Munich forms the strongest squad in the Bundesliga every season. The squads of Dortmund and Leverkusen are not strong enough next season. So unless Munich's performance deteriorates badly, Munich will definitely dominate the Bundesliga again.