I must admit im in 2 minds about this,
If he is in game shape and not coming in with injuries ala Abney, he only needs to play around 15 mins a game, maybe let him be the main man with the 2nd unit,I reckon even at 37 he would be ok in that kind of role, and could really light it up for the crowd at times to, he played HSH a couple of years back and still had it, being such a big fan of his back in the day i would love to see it, maybe you could offer him minimum, make sure he is ok only playing 15 mins off the bench, give him a license to score when he is on, and it could easily work for around 10pts in 15 mins.
But on the other hand he's 37 and hasnt played NBL for years, so could easily go the way of Abney, but we are better than the Crocs and he only has to be our 8th man, where the Crocs really needed Abney to be starter/6th man level.
Personally id probably say no, get someone younger, currently playing pro ball in say the d-league, but man the 'basketball romantic' in me would love to see Willie back playing off the bench.