I would argue that the current non-supercruise capable J-20 probably would not be able to outperform the F-22 (which would probably be the best fighter plane up until the late 2020's, when the WS-15 version of J-20 and upgraded Sukhoi T-50 become available). However, the J-20 should be able to at least match the performance of the F-35A and have superior combat radius. The F-35A isn't designed to supercruise.
Its quite doubtful that the J-20 or T-50 will actually ever outperform the F-22 IMHO, the F-22 was designed as a "money is no object", stealthy, supercruise and supermaneuverability the whole package, and the F-119s, while upgraded in the F-135 are still extremely cutting edge.
Now the J-20 should be very L/O, while we know the T-50 has compromised on L/O in order to have more "terminal performance", and they may both eventually be "faster", possibly even as or more maneuverable, but as for L/O, supercruise, and avionics, the F-22 is still in a very rarified class.