What I'd like to see is for Ted to detach from the GOP and join up with the U.S. Constitution Party. That would give the USCP a marquee leader and a bigger role on the national stage. As the GOP implodes -- and it will -- the USCP offers a more conservative platform and an organizational infrastructure. All it needs is an influx of people to populate it and advance it to major-league status. Ted could lead that migration.
A year ago I would've disagreed, but it has become clear that Cruz's worst political enemy is not the democrats, its the GOP.
They have been at least a party to the smears against him, if not the source, and clearly consider him more of a threat than they did Trump.
IMO they will NEVER let him get near the nomination, in 2020 or at any other time, so if he can maintain his seat as a member of the Constitution Party then he's got absolutely nothing to lose by making the change.