1. withdraw support, then either snap polls or alternative government with CONs' support
2. continue support....their credibility is finished and BJP will be used forever by all crooks as condoms.
In case, BJP withdraws support, CONs' are not likely to support JD-(Sick) for CM's post. Unlike oldies of BJP, oldies of CONs' are smart. They know that secularists are inherently untrustworthy and prone to backstabbing. So, it is either a CON CM or snap polls preceded by some internvention of president's rule.
Elections, whenever they are held are not that much likely to change the scenario given that HDD and his troupe of looters are smart cookies. Only silver lining in the dark cloud is that people are slowly realing that crooks controlling various regional parties are holding national politics to ransom.