It all now depends on Lee CW, whether he can take it, i.e. Lin Dan's wild card entry, in the right attitude and spirit. On a positive note, Lee CW might view it as a challenge to spur him on, dig his heels in the next three months training harder than ever with grim determination for what is possibly his last chance at the world title. I'm pretty sure he's fully aware time is not on his side and that this August's WC offers him perhaps the best prospects, what with Lin Dan's off-peak form and Chen Long not yet too strong for him (it's also less likely for CL to beat him three times in a row but let's not overlook other contenders and dark horse). I always believe life is unpredictable, anything to do with human affairs are hard to prognosticate, the best of plans can go awry, and suchlike.
Whatever it is, Lin Dan's participation should make the world championship complete and no-one can take anything away from the eventual winner ( for Lin Dan not being at his best is his own problem). I guess the wild card grant by BWF is, I suspect, the outcome of pressure by the big-time sponsors whom BWF are unwilling to offend, considering that Thomas Lund has previously openly rebuffed CBA's request.