After the disappointing Russian canard MiG 1.42/1.44/MFI/39 was abandoned due to Sukhois revolutionary Su-27 family that includes the 27, 32/34, 37, and experimental FSW 47... MiG decided to go with a new interceptor based on the MiG-31 Foxhound that succeeded the MiG-25 Foxbat. MiG decided to enlarge the airframe, use new materials in construction, and simply use speed to defeat stealth. At Mach 4.3 max speed, the MiG-41 Foxhunter (presumed codename) will simply outsee, outfight, and outrun any US or Euro fighter. The plane will use multiple AESA radars and fire Beyond Visual Range- Ultra hypersonic missiles. The old SR-71's unofficial Mach 3 at 80,000 ft performance (reality was Mach 3.2 to 104,000') will be shattered for an operational military aircraft. The MiG-41 ceiling remains classified. Russia also has the cash to upgrade 100 MiG-31s to a higher standard and is proceeding with that too. The aircraft will have IOC of 2020, maybe sooner...

Note: B-2 at risk already from Russian anti-cellular radar networks linked to S-400 missiles and can still be intercepted by the Flanker family, the Fulcrums, and the Foxhounds. The F-22 production was halted at 120 a/c and cannot beat the Flanker family that has IRST as well as EO sight systems and BVRs as well. The Foxhunter will see even farther and its missiles are hypersonic. F-22 cannot match altitude either and F-35 still not operational as it is plagued by bugs and similarly is underequipped to deal with these new techno threats, especially over Russian or Chinese airspace.