I have no acknowledgement about another circuit on Qatar than the Losail circuit as the country's core. Let's not forget, they want to present the Jeddah circuit for its debut. No appointment whatsoever...
There currently isn’t another circuit, but the 10 year deal does not specifically mention the Losail track. A street circuit has been mooted for some time and Losail isn’t really suited as a long term track for F1unless they make a lot of enhancements. How that would effect Moto GP I have no idea.