The new Chinese J-20 fighter prototype has been unveiled (unofficially) and was photographed and filmed a lot in the past days.
We already saw that the Russian developers of the PAK-FA / T-50 appeared to place a greater emphasis on agility than the U.S. F-22, and the J-20's developers seem to have done the same. The signs are a bit more subtle this time (the T-50 almost looked like a good old Russian 80's aerobatics fighter):
The fins below the tail (good for high angle of attack - only necessary while manoeuvring), the turbofan nozzles (apparently thrust vectoring in one more dimension than the F-22's) and the canards both point at a more agile fighter.
The sheer size on the other hand points at a large internal fuel volume (possibly also a large internal weapons bay) with correspondingly great range.
The latter reduces the necessity of tanker aircraft, which should be taken into account as reducing the overall cost of an air force. A good range also helps a lot to overcome operational problems and reduces the potential for friction (such as suddenly unavailable tankers).
The overall appearance suggests that the J-20 is meant to be at least a low-observable (LO) combat aircraft ("fighter" is just an assumption), probably even meant to be less detectable than the T-50 (you cannot read everything from the shaping, but it really seems to point at frontal VLO and LO to the sides).
I suspect that this aircraft will become operational in significant quantity rather late in this decade.
The good news: It's most likely no problem for Europeans, as long as they don't meddle in East Asian affairs.