Is this the last Stargazer mission?

Space.com website states that Swift Boost mission will be the last flight of the Pegasus rocket. Will there be another new design of a rocket that can be mated to the L-1011 or will this also mean the final end of an era for the aircraft type too?

An air-launched Northrop Grumman Pegasus XL rocket is scheduled to fly for the very last time early Tuesday morning (June 30), sending a private spacecraft on a rescue mission to save one of NASA's most iconic space telescopes from falling back to Earth.

Full article here:

Space.com: NASA to launch rescue mission